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You Are Here:   Home  >  What Do You Want to Do?  >  Hiking  >  Boulder Day Hike Trails

Boulder Region Day Hiking Trails Index

On This Page:  Trails Map  I  Trails List 

Day Hiking Trails Map

Blue trail marker= Trail marker. Click for trail name, difficulty, miles and links to descriptive webpages and/or quicksheets. Quicksheets are printable PDF files.

Yellow trail system marker= Federal trail system marker. Click for system name, additional information and links to descriptive webpages and/or maps.

Green trail system marker= State trail system marker. Click for system name, additional information and links to descriptive webpages and/or maps.

Red trail system marker= Local trail system marker. Click for system name, additional information and links to descriptive webpages and/or maps.

WARNING: A marker close to another may hide it. Zoom in to separate overlapped markers. 


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Day Hiking Trails List

Trail Name / Links to Descriptions 1-Way (mi) Rise (ft) Difficulty
Anne U. White Trail. (Boulder County Parks and Open Space.) BCP&OS trail webpage.
See description "Anne U White Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
S
ee description "Anne U. White Trail" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
1.6 +500 Easy to moderate
Arapaho Glacier Trail #905. USFS webpage. USFS quicksheet.
See description "Arapaho Glacier Trail 905 to Arapaho Pass Trail 904" under "Indian Peaks Wilderness" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Arapaho Glacier Trail 905 to Arapaho Pass Trail 904" under "Non-Mechanized Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Arapaho Glacier Trail #905" under "South Map Trails" on Sky Terrain's map Southern Rocky Mountain National Park / Indian Peaks Wilderness.
See description "Arapaho Glacier Trail 905 to Arapaho Pass Trail 904" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
7.8 +2,700 Moderate
Arapaho Lakes Trail #818. (Line but no number on USFS map.)      
Arapaho Pass Trail #904. USFS webpage. USFS quicksheet. ORIC Trail Map/Description Sheet (1).
See chapter "23. Arapaho Pass and Caribou Pass" in Colorado Mountain Club's book The Best Front Range Hikes.
See chapter "1. Arapaho Pass and Caribou Pass" in  Colorado Mountain Club's book Pack Guide: The Best Boulder Hikes.
See description "Arapaho Pass Trail 904 to Monarch Lake" under "Indian Peaks Wilderness" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Arapaho Pass Trail 904 to Monarch Lake" under "Non-Mechanized Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Arapaho Pass Trail 904 to Monarch Lake" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
ORIC FAVORITE
3.3 +1,806 Moderate
Bald Mountain Scenic Area Pines to Peak Loop Trail. (Boulder County Parks and Open Space.) BCP&OS park webpage. BCP@OS park brochure. BCP&OS trail map. BCP&OS trails elevation graph.
See chapter "23. Bald Mountain Scenic Area" in Falcon Guide Hiking Colorado's Front Range.
See description "Bald Mountain Loop" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
1.5 +160 Easy
Baptiste Trail #815. USFS quicksheet. 1.0 + approach    
Bear Canyon Trail. (City of Boulder Open Space and Mountain Parks.)  CBOS&MP trailhead webpage. CBOS&MP trail system map.
See description "Bear Canyon Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
2.9 +1,540 Easy to moderate
Bear Canyon Creek Trail. (City of Boulder Open Space and Mountain Parks.)  CBOS&MP trail system map.
See description "Bear Canyon Creek Bike Path" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
2.7 +160 Easy
Bear Peak. (City of Boulder Open Space and Mountain Parks.) CBOS&MP NCAR trailhead webpageCBOS&MP South Mesa trailhead webpage. CBOS&MP trail system map. ORIC Trail Map/Description Sheet (2).
See chapter "24. Bear Peak Loop via Fern Canyon and West Ridge" in Colorado Mountain Club's book The Best Front Range Hikes.
See chapter "27. Bear Peak" in Falcon Guide Hiking Colorado's Front Range.
See chapter "2. Bear Peak Loop via Fern Canyon and West Ridge" in Colorado Mountain Club's book Pack Guide: The Best Boulder Hikes.
See description "Bear Peak Trail" under "Boulder Open Space and Mountain Parks" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Bear Peak Trail" under "Non-Mechanized Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Fern Canyon (to Bear Peak)" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Shadow Canyon Trail (to Bear Creek or South Boulder Peak" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Bear Peak Trail" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
3.75 +2,786 Strenuous
Bear Peak West Ridge Trail. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trail system map.
See description "Bear Peak West Ridge Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
1.7 + approach 1,270 Moderate to strenuous
Beaver Creek Trail #911. USFS webpage. USFS quicksheet.
See description "Beaver Creek Trail #911" under "South Map Trails" on Sky Terrain's map Southern Rocky Mountain National Park / Indian Peaks Wilderness.
6.9 +1,600 Moderate
Beaver Reservoir Cutoff Trail #835. (Also known as #851.) USFS webpage. 0.5 +200 Easy
Betasso Preserve Trail System. (Boulder County Parks and Open Space.) BCP&OS park webpage. BCP@OS park brochure. BCP&OS trails map. BCP&OS trails elevation graph.
See chapter "24. Betasso Preserve" in Falcon Guide Hiking Colorado's Front Range.
See description "Canyon Trail -- Benjamin Loop -- Fourmile Connector" under "Boulder County" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Canyon Trail -- Betasso Preserve" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Canyon Loop (Betasso Preserve)" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Canyon Trail -- Betasso Preserve" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
     
Big Bluestem Trail. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trailhead webpage. CBOS&MP trail system map.
See description "Big Bluestem Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
1.7 +1,270 Easy to moderate
Boulder, City of, Open Space and Mountain Parks Trail System. CBOS&MP trails webpage. CBOS&MP trail system map.
See description "Foothills Trail to Eagle Trail to Boulder Reservoir" under "Boulder Open Space and Mountain Parks" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
     
Boulder County Parks and Open Space Trail System. BCP&OS trails webpage. BCP&OS open space interactive map. BCP&OS open space PDF map. BCP&OS all trails PDF map.      
Boulder Creek Path. (City of Boulder Open Space and Mountain Parks.)  BoulderGuide.info webpage.
See chapter "5. Boulder Creek Path" in Colorado Mountain Club's book  Pack Guide: The Best Boulder Hikes.
See description "Boulder Creek Bike Path" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
7.2 +540 Easy
Boulder Falls. LocalHikes webpage. 0.3 +60 Easy
Boulder Valley Ranch Trail System. (City of Boulder Open Space and Mountain Parks). CBOS&MP trailhead webpage. CBOS&MP trail system map.
See description "Boulder Valley Ranch" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Eagle / Sage Loop" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
S
ee description "Left Hand Trail" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
     
Boy Scout Trail. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trailhead webpage. CBOS&MP trail system map.
See description "Boy Scout Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
1.2 +130 Moderate
Brainard Lake Recreation Area Trail System. (US Forest Service.) USFS webpage. USFS quicksheet. USFS map. USFS Little Raven Trail webpage. USFS Waldrop Trail webpage.      
Bright Trail #921. USFS webpage. USFS quicksheet. 1.7 -1,380 Moderate to strenuous
Buchanan Pass Trail #910. USFS webpage. USFS quicksheet.
See description "Buchanan Pass Trail to Coney Creek Rd 507 Loop" under "Boulder County" on Latitude 40 Degrees Front Range Colorado Trails Recreation Topo Map.
See description "Buchanan Pass Trail 910 to Monarch Lake via Cascade Creek Trail 1" under "Indian Peaks Wilderness" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Buchanan Pass Trail to Coney Creek Rd 507 Loop" under "Multi-Use Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Buchanan Pass Trail 910 to Monarch Lake via Cascade Creek Trail 1" under "Non-Mechanized Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Buchanan Pass Trail #910" under "North Map Trails" on Sky Terrain's map Southern Rocky Mountain National Park / Indian Peaks Wilderness.
See description "Buchanan Pass Trail 910 to Monarch Lake via Cascade Creek Trail 1" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
9.1 +3,237 Moderate to strenuous
Button Rock Preserve / Sleepy Lion Trail. (City of Longmont.) Longmont webpage.
See chapter "13. Button Rock Preserve" in Falcon Guide Hiking Colorado's Front Range.
5.9 loop +700 Moderate
Caribou Ranch Trail System. (Boulder County Parks and Open Space.) BCP&OS park webpage. BCP&OS park brochure. BCP&OS trails map. BCP&OS trails elevation graph.
See description "Delonde Trail to Bluebird Loop -- Caribou Ranch Open Space" under "Indian Peaks Wilderness" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Caribou Ranch Open Space -- Delonde Trail to Bluebird Loop" under "Non-Mechanized Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Caribou Ranch (Blue Bird Loop & Delonde Tr)" under "West Map (Nederland) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Caribou Ranch Open Space -- Delonde Trail to Bluebird Loop" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
     
Carolyn Holmberg Preserve at Rock Creek Farm Trail System. (Boulder County Parks and Open Space.) BCP&OS park webpage. BCP&OS park brochure. BCP&OS trails map.      
Ceran Saint Vrain Trail #801. (Line but no number on USFS map.) USFS webpage. USFS quicksheet.
See chapter "16. Ceran St. Vrain Trail" in Falcon Guide Hiking Colorado's Front Range.
See description "Ceran St. Vrain Trail 801 to Miller Rock" under "Boulder County" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Ceran St. Vrain Trail 801 to Miller Rock" under "Multi-Use Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Ceran St. Vrain Trail 801 to Miller Rock" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
1.9 -300 Easy
Chautauqua Meadow Trail System. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trailhead webpage. CBOS&MP trail system map.
See chapter "18. Royal Arch" in Colorado Mountain Club's book Pack Guide: The Best Boulder Hikes.
See description "Royal Arch" under "Non-Mechanized Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Royal Arch Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Royal Arch" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
     
Chittenden Mountain Trail. GORP Trail Finder webpage. 2.0 +379 Moderate
Coal Creek / Rock Creek Regional Trail System. (Multiple agencies.) BCP&OS Coal Creek Trail webpage. BCP&OS Rock Creek Trail webpage. Regional Trail System brochure.
See description "Coal Creek Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
     
Coalton Trailhead Trail System. (Boulder County Parks and Open Space.) BCP&OS park webpage. BCP&OS trails map.
See description "High Plains Trail" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Coalton Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See description "High Plains Trail" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
     
Colorado Front Range Trail System. (Colorado Parks & Wildlife.) CP&W trail webpage. CP&W trail north section overview map. CP&W trail detailed maps.      
Community Ditch Trail. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trailhead webpage. CBOS&MP trail system map.
See description "Community Ditch Trail to Greenbelt Plateau Trail" under "Boulder County" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Community Ditch Trail to Greenbelt Plateau Trail" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
3.1 +40 Easy
Coney Creek Trail #914. USFS webpage. USFS quicksheet. 2.2 + approach +1,400 Moderate
Continental Divide Trail -- Rollins Pass to James Peak. USFS webpage. 6.5 +1,624  
Crater Lakes Trail #819. (Not on USFS map.) USFS webpage. USFS quicksheet. 1.0 + approach +1,389 Moderate
Davidson Mesa Loop. (City of Louisville Open Space.) LocalHikes webpage. See description "Davidson Mesa Loop -- Louisville" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Davidson Mesa Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Davidson Mesa Loop Trail" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
2.7 loop +67 Easy
Devils Thumb Trail #902. USFS webpage. USFS quicksheet.
See chapter "19 - Devils Thumb Lake" in Altitude Publishing's book The Best Hikes of Colorado.
See description "Devils Thumb Trail #902 -- Hessie Trailhead" under "South Map Trails" on Sky Terrain's map Southern Rocky Mountain National Park / Indian Peaks Wilderness.
See description "Devil's Thumb Pass Trail 902" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
6.5 +2,775 Moderate
Diamond Lake Trail #975. USFS webpage. USFS quicksheet.
See chapter "18 -- Diamond Lake" in Altitude Publishing's book The Best Hikes of Colorado.
See chapter "27. Diamond Lake" in Colorado Mountain Club's book The Best Front Range Hikes.
See chapter "6. Diamond Lake" in Colorado Mountain Club's book Pack Guide: The Best Boulder Hikes.
See description "Diamond Lake Trail 975" under "Indian Peaks Wilderness" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Diamond Lake Trail 975" under "Non-Mechanized Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
S
ee description "Diamond Lake Trail #975" under "South Map Trails" on Sky Terrain's map Southern Rocky Mountain National Park / Indian Peaks Wilderness.
See description "Diamond Lake Trail 975" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
2.6 + approach +1,300 Moderate
Doudy Draw Trail System. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trailhead webpage. CBOS&MP trail system map.
See chapter "32. Doudy Draw Trail" in Falcon Guide Hiking Colorado's Front Range.
See chapter "7. Doudy Draw" in Colorado Mountain Club's book Pack Guide: The Best Boulder Hikes.
See description "Doudy Draw Trail" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Doudy Draw Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
S
ee description "Doudy Draw Trail" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
     
Dry Saint Vrain Trail #920. USFS webpage. USFS quicksheet. 1.5 -840 Easy
Eldorado Canyon State Park Trail System. (Colorado Parks & Wildlife.) CP&W trails webpage. CP&W trails map.
See chapter "28. Eldorado Canyon Trail" in Colorado Mountain Club's book The Best Front Range Hikes.
See chapter "34. Eldorado Canyon Trail" in Falcon Guide Hiking Colorado's Front Range.
See chapter "8. Eldorado Canyon Trail" in Colorado Mountain Club's book Pack Guide: The Best Boulder Hikes.
See description "Eldorado Canyon Trail to Walker Ranch Open Space" under "Eldorado Canyon State Park" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Elderado Canyon Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Eldorado Canyon Trail" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
See chapter "33. Rattlesnake Gulch" in Falcon Guide Hiking Colorado's Front Range.
See description "Rattlesnake Gulch Trail" under "Eldorado Canyon State Park" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Rattlesnake Gulch Trail" under "Multi-Use Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Rattlesnake Gulch Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland. 
See description "Rattlesnake Gulch Trail" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
See description "Fowler Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Fowler Trail" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
     
Flagstaff Summit Trail System. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trailhead webpage. CBOS&MP trail system map.
See description "Flagstaff Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Tenderfoot Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Ute Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
     
Flatirons Vista Trail System. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trailhead webpage. CBOS&MP trail system map.      
Foothills / Wonderland Lake Trail System. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trailhead webpage. CBOS&MP trail system map.
See description "Foothills Trail to Eagle Trail to Boulder Reservoir" under "Boulder Open Space and Mountain Parks" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Foothills Trail to Eagle Trail to Boulder Res." under "Multi-Use Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Foothills Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See trail description "Foothills Trail to Eagle Trail to Boulder Reservoir" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
See description "Hogback Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Hogback Ridge Loop Trail" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
     
Forest Lakes Trail #809. USFS webpage. ORIC Trail Map/Description Sheet (13).
See description "Forest Lakes Trail via East Portal" under "Gilpin County" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Forest Lakes Trail #809" under "South Map Trails" on Sky Terrain's map Southern Rocky Mountain National Park / Indian Peaks Wilderness.
2.8 + approach +1,645 Moderate
Forsythe Canyon Trail #852. (Line but no number on USFS map.) USFS webpage.
See description "Forsythe Canyon Trail #852" under "West Map (Nederland) Trails" on Sky Terrain's map Boulder / Nederland.
1.0 -400  
Front Range Trail System. (US Forest Service.) USFS webpage.      
Green Mountain West Ridge Trail. (City of Boulder Open Space and Mountain Parks.) REI webpage. CBOS&MP trail system map.
See description "Green Mountain West Ridge Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Green Mountain West Ridge Trail" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
1.4 +480 Moderate
Greenbelt Plateau Trail System. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trailhead webpage. CBOS&MP trail system map.
See description "High Plains Trail" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Greenbelt Plateau Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
     
Gregory Canyon Trail System. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trailhead webpage. CBOS&MP trail system map.
See chapter "29. Green Mountain via Gregory Canyon" in Colorado Mountain Club's book The Best Front Range Hikes.
See chapter "9. Green Mountain via Gregory Canyon" in Colorado Mountain Club's book Pack Guide: The Best Boulder Hikes.
See chapter "26. Gregory Canyon: Green Mountain Loop" in Falcon Guide Hiking Colorado's Front Range.
See description "Gregory Canyon Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Saddle Rock Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
     
Gross Reservoir Inlet Trail. Also known as the Osprey Trail. (Not on USFS map.) USFS webpage.
See description "Osprey Trail" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
1.0 -300 Easy
Guinn Mountain Trail #820. USFS quicksheet. 4.4 counting approach from Eldora Ski Area +1,680 Extremely strenuous
Hall Ranch Trail System. (Boulder County Parks and Open Space.) BCP&OS park webpage. BCP&OS park brochure. BCP&OS trails map. BCP&OS trails elevation graphs.
See chapter "14. Hall Ranch" in Falcon Guide Hiking Colorado's Front Range.
See chapter "16. Nighthawk Trail" in Colorado Mountain Club's book Pack Guide: The Best Boulder Hikes.
See description "Bitter Brush Trail to Nelson Loop: Hall Ranch Open Space" under "Boulder County" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Bitterbrush Trail lto Nelson Loop: Hall Ranch Open Space" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
     
Heil Valley Ranch Trail System. (Boulder County Parks and Open Space.) BCP&OS park webpage. BCP&OS park brochure. BCP&OS trails map. BCP&OS trails elevation graphs.
See chapter "21. Heil Valley Ranch" in Falcon Guide Hiking Colorado's Front Range.
See chapter "20. Heil Valley Ranch / Lichen Loop" in Falcon Guide Hiking Colorado's Front Range.
See description "Lichen Loop Trail" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
See description "Heil Valley Ranch to Lyons -- Wapiti Trail to Picture Rock Trail" under "Boulder County" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
Isabelle Glacier Trail #908. USFS webpage. USFS quicksheet.
See description "Isabelle Glacier Trail 908" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
4.2 + approach +1,100 Moderate to strenuous
James Peak Lake Trail #804. USFS webpage. USFS quicksheet. 1.1 -388 Moderate
Jean Lunning Trail #907 via Niwot Cutoff Trail. USFS webpage. USFS quicksheet. 1.9 +350 Easy
Jenny Creek Trail #808. USFS webpage. USFS quicksheet.
See description "Rollins Pass (Corona Pass) via Jenny Creek Trail FS 502" under "Boulder County" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Rollins Pass (Corona Pass) via Jenny Creek Trail FS 502" under "Multi-Use Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Jenny Creek Trail #808 & Forest Road #502" under "South Map Trails" on Sky Terrain's map Southern Rocky Mountain National Park / Indian Peaks Wilderness.
1.6 to 5.3 Varies Moderate to Strenuous
King Lake Trail #901. USFS webpage. USFS quicksheet. Side trip to Betty and Bob Lakes via Trail #810.
See description "King Lake Trail 901" under "Indian Peaks Wilderness" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "King Lake Trail 901" under "Multi-Use Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Kings Lake Trail #901 to Betty & Bob Lakes Trail #810" under "South Map Trails" on Sky Terrain's map Southern Rocky Mountain National Park / Indian Peaks Wilderness.
See description "King Lake Trail 901" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
5.7 +2,650 Moderate
Lagerman Reservoir Trail. (Boulder County Parks and Open Space.) BCP&OS park webpage. BCP&OS trail map. 1.6 loop   Easy
Lefthand Trail. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trailhead webpage. CBOS&MP trail system map.
See description "Lefthand Valley Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
2.8 +90 Easy
Long Canyon Trail. (City of Boulder Open Space and Mountain Parks.) away.com trailhead webpage. CBOS&MP trail system map.
See description "Long Canyon Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
1.4 +760 Moderate
Lost Lake Trail #813. USFS webpage. USFS quicksheet.
See description "Lost Lake Trail #913" under "South Map Trails" on Sky Terrain's map Southern Rocky Mountain National Park / Indian Peaks Wilderness.
See description "Lost Lake Trail 813" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
0.3 + approach +200 Moderate
Louisville (City of) Parks and Recreation Trail System. LPR trails map.      
Marshall Mesa Trail System. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trailhead webpage. CBOS&MP trail system map.
See chapter "31. Marshall Mesa" in Falcon Guide Hiking Colorado's Front Range.
See chapter "11. Marshall Mesa" in Colorado Mountain Club's book Pack Guide: The Best Boulder Hikes.
See description "Marshall Mesa Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
     
McClintock and Enchanted Mesa Trail System. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trailhead webpage. CBOS&MP trail system map.
See description "Mesa Trail" under "Boulder Open Space and Mountain Parks" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Royal Arch Trail" under "Boulder Open Space and Mountain Parks" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Enchanted Mesa Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See description "McClintock Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Woods QuarryTrail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
     
Mesa Trail. (City of Boulder Open Space and Mountain Parks.) CBOS&MP Chautauqua trailhead webpage. CBOS&MP South Mesa trailhead webpage. CBOS&MP trail system map.
See chapter "32. Mesa Trail" in Colorado Mountain Club's book The Best Front Range Hikes.
See chapter "13. Mesa Trail" in Colorado Mountain Club's book Pack Guide: The Best Boulder Hikes.
See description "Mesa Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Mesa Trail" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
See description "Mesa Trail" under "Non-Mechanized Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
6.8 +730 Easy to moderate.
Mitchell Lake Trail #912. USFS webpage. USFS quicksheet.
See chapter "26. Blue Lake" in Colorado Mountain Club's book The Best Front Range Hikes.
See chapter "18. Blue Lake" in Falcon Guide Hiking Colorado's Front Range.
See chapter "4. Blue Lake" in Colorado Mountain Club's book Pack Guide: The Best Boulder Hikes.
See description "Blue Lake via Mitchell Lake Trail 912" under "Indian Peaks Wilderness" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Blue Lake via Mitchell Lake Trail" under "Non-Mechanized Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Mitchell Lake & Blue Lake Trail #912" under "South Map Trails" on Sky Terrain's map Southern Rocky Mountain National Park / Indian Peaks Wilderness.
See description "Blue Lake via Mitchell Lake Trail 912" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
2.5 +800 Moderate
Mount Audubon Trail #913. USFS webpage. USFS quicksheet.
See chapter "17 -- Mount Audubon" in Altitude Publishing's book The Best Hikes of Colorado.
See chapter "33. Mount Audubon" in Colorado Mountain Club's book The Best Front Range Hikes.
See chapter "17. Mount Audubon" in Falcon Guide Hiking Colorado's Front Range.
See chapter "14. Mount Audubon" in Colorado Mountain Club's book Pack Guide: The Best Boulder Hikes.
See description "Mount Audubon Trail 913" under "Indian Peaks Wilderness" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Mount Audubon Trail 913" under "Multi-Use Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Mt Audubon #913" under "South Map Trails" on Sky Terrain's map Southern Rocky Mountain National Park / Indian Peaks Wilderness.
See description "Mount Audubon Trail 913" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map. 
3.8 + approach +2,723 Moderate to Strenuous
Mount Sanitas Trail System. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trailhead webpage. CBOS&MP trail system map.
See chapter "34 -- Mount Sanitas" in Altitude Publishing's book The Best Hikes of Colorado.
See chapter "15. Mount Sanitas" in Colorado Mountain Club's book Pack Guide: The Best Boulder Hikes.
See chapter "22. Mount Sanitas" in Falcon Guide Hiking Colorado's Front Range.
See description "Mount Sanitas to Sanitas Valley" under "Boulder Open Space and Mountain Parks" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Mount Sanitas to Sanitas Valley" under "Non-Mechanized Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Mount Sanitas" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Mount Sanitas to Sanitas Valley" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
See description "Sanitas Valley Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
     
Mud Lake Open Space Trail System. (Boulder County Parks and Open Space.) BCP&OS park webpage. BCP&OS park brochure. BCP&OS trails map.
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ee description "Mud Lake Trails" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
     
NCAR Trail System. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trailhead webpage. CBOS&MP trail system map.
See description "Skunk Canyon Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
     
Niwot Ridge Trail #906. USFS Jean Lunning Trail webpage.
See description "Niwot Ridge Trail 906" under "Indian Peaks Wilderness" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Niwot Ridge Trail 906" under "Multi-Use Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
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ee description "Niwot Ridge Trail #906" under "South Map Trails" on Sky Terrain's map Southern Rocky Mountain National Park / Indian Peaks Wilderness.
See description "Niwot Ridge Trail #906)" under "West Map (Nederland) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Niwot Ridge Trail 906" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
2.2 +942 Moderate
Niwot Trail System. (Boulder County Parks and Open Space.) BCP&OS trails webpage. BCP&OS trails map.
See description "Niwot Loop" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
6.4 loop +70 Easy
Pawnee Pass Trail #907. USFS webpage. USFS quicksheet. ORIC Trail Map/Description Sheet (23).
See chapter "35. Pawnee Pass" in Colorado Mountain Club's book The Best Front Range Hikes.
See chapter "17. Pawnee Pass" in Colorado Mountain Club's book Pack Guide: The Best Boulder Hikes.
See description "Pawnee Pass Trail 907 to Pawnee Lake via Brainard Lake" under "Indian Peaks Wilderness" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Pawnee Pass Trail 907 to Pawnee Lake via Brainard Lake" under "Multi-Use Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Pawnee Pass Trail #907 & TR #1" under "South Map Trails" on Sky Terrain's map Southern Rocky Mountain National Park / Indian Peaks Wilderness.
See description "Pawnee Pass Trail 907 to Pawnee Lake via Brainard Lake" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
ORIC FAVORITE
4.6 +2,041 Moderate to strenuous
Pella Crossing Trail System. (Boulder County Parks and Open Space.) BCP&OS park webpage. BCP&OS east trails map. BCP&OS west trails map.      
Rabbit Mountain Trail System. (Boulder County Parks and Open Space.) BCP&OS park webpage. BCP&OS park brochure. BCP&OS trails map. BCP&OS trails elevation graphs.
See chapter "15. Rabbit Mountain" in Falcon Guide Hiking Colorado's Front Range.
See description "Eagle Wind Trail Loop: Rabbit Mountain Open Space" under "Boulder County" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Eagle Wind Trail Loop: Rabbit Mountain Open Space" under "Multi-Use Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.  
     
Rainbow Lakes Trail #918. (#910 on USFS map.) USFS webpage. USFS quicksheet.
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ee description "Rainbow Lakes Trail 910" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
1.2 +250 Easy
Red Deer Lake Trail #824. (Line but no number on USFS map.)      
Saint Vrain Glacier Trail #917. USFS webpage.
See chapter "16 -- Gibraltar Lake" in Altitude Publishing's book The Best Hikes of Colorado.
See description "St Vrain Glacier Trail #917" under "North Map Trails" on Sky Terrain's map Southern Rocky Mountain National Park / Indian Peaks Wilderness.
8.1 +2,600  
Saint Vrain Mountain Trail #915. USFS webpage. USFS quicksheet.
See chapter "31. Meadow Mountain and St. Vrain Mountain" in Colorado Mountain Club's book The Best Front Range Hikes.
See chapter "11. Meadow Mountain and St. Vrain Mountain" in Colorado Mountain Club's book Pack Guide: The Best Boulder Hikes.
See description "St Vrain Mtn Trail #915" under "North Map Trails" on Sky Terrain's map Southern Rocky Mountain National Park / Indian Peaks Wilderness.
6.5 +3,262 Moderate to strenuous
Sawhill Ponds Wildlife Refuge Trail System. (Manager: City of Boulder Open Space and Mountain Parks. Owner: Colorado Division of Wildlife.) CBOS&MP trailhead webpage CBOS&MP trail system map.
See description "Sawhill & Walden Ponds Trails" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
     
Settlers' Park / Red Rocks Trail System. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trailhead webpage. CBOS&MP trail system map.
See description "Anemone Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Red Rocks Trails" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
     
Shanahan Ridge Trail System. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trailhead webpage. CBOS&MP trail system map.
See description "Shanahan Trails" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
Sourdough Trail #835. USFS webpage. USFS quicksheet.
See description "Sourdough Trail 835 from CR 116 to Brainard Lake Road 102" under "Boulder County" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "Sourdough Trail 835 from CR 116 to Brainard Lake Road 102" under "Multi-Use Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Sourdough Trail #835" under "South Map Trails" on Sky Terrain's map Southern Rocky Mountain National Park / Indian Peaks Wilderness.
See description "Sourdough Trail #835" under "West Map (Nederland) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Sourdough Trail 835 from CR 116 to Brainard Lake Drive" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
14.7 +880 Easy to moderate
South Boulder Creek Trail #900. USFS webpage.
See chapter "30. Heart Lake" in Colorado Mountain Club's book The Best Front Range Hikes.
See chapter "19. Heart Lake" in Falcon Guide Hiking Colorado's Front Range.
See chapter "10. Heart Lake" in Colorado Mountain Club's book Pack Guide: The Best Boulder Hikes.
See description "South Boulder Creek Trail 900 to Rogers Pass via East Portal" under "Gilpin County" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "South Boulder Creek Trail #900" under "South Map Trails" on Sky Terrain's map Southern Rocky Mountain National Park / Indian Peaks Wilderness.
4.2 +2,660  
South Boulder Creek, West Trailhead Trail System. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trailhead webpage. CBOS&MP trail system map.
See descriptions "South Boulder Creek Trail (lower)," "South Boulder Creek Trail (middle)," and "South Boulder Creek Trail (upper)" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland. 
See trail description "South Boulder Creek Trail to Big Bluestem Trail Loop" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
     
South Mesa Trail System. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trailhead webpage. CBOS&MP trail system map.      
South Saint Vrain Trail #909. (Line but no number on USFS map.) USFS webpage. USFS quicksheet.
See description "South Saint Vrain Trail #909" under "West Map (Nederland) Trails" on Sky Terrain's map Boulder / Nederland.
5.9 +1,700 Easy to moderate
Sugarloaf Mountain Trail.
See chapter "25. Sugar Loaf Mountain" in Falcon Guide Hiking Colorado's Front Range.
See description "Sugarloaf Mountain Trail" under "West Map (Nederland) Trails" on Sky Terrain's map Boulder / Nederland.
0.8 +470 Moderate
Teller Farm Area Trail System. (City of Boulder Open Space and Mountain Parks.) ProTrails webpage. CBOS&MP trail system map.
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ee trail description "East Boulder Trails" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
     
Twin Lakes Trail System. (Boulder County Parks and Open Space.) BCP&OS park webpage. BCP&OS trails map.      
Ute Trail #803. USFS webpage. USFS quicksheet. 4.5 + approach +1,215 Moderate
Viewpoint Trail. (City of Boulder Open Space and Mountain Parks.) mapmyrun webpage. CBOS&MP trail system map.
See description "Viewpoint Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
1.1 +500 Moderate
Walden Ponds Wildlife Habitat Trail System. (Boulder County Parks and Open Space.) BCP&OS trails webpage. BCP&OS park brochure. BCP&OS trails map.
See chapter "30. Walden Ponds Wildlife Area" in Falcon Guide Hiking Colorado's Front Range.
See description "Sawhill & Walden Ponds Trails" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
     
Walker Ranch Trail System. (Boulder County Parks and Open Space.) BCP&OS park webpage. BCP&OS park brochure. BCP&OS trails map. BCP&OS trails elevation graphs.
See chapter "37. Walker Ranch Loop" in Colorado Mountain Club's book The Best Front Range Hikes.
See chapter "20. Walker Ranch" in Falcon Guide Hiking Colorado's Front Range.
See chapter "20. Walker Ranch Loop" in Colorado Mountain Club's book Pack Guide: The Best Boulder Hikes.
See description "Walker Ranch Loop -- Walker Ranch Open Space" under "Multi-Use Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Walker Ranch Loop -- Walker Ranch Open Space" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
See chapter "28. Myers Homestead Trail" in Falcon Guide Hiking Colorado's Front Range.
See description "Meyers Homestead Trail" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map.
See description "Myers Homestead Trail" under "East Map (Boulder) Trails" on Sky Terrain's map Boulder / Nederland.
See description "Meyers Homestead Trail" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
     
Wapiti Trail #816. USFS quicksheet. 1.0 + approach    
West Magnolia Trail System. (US Forest Service.) USFS webpage.
See description "West Magnolia Area Trails" under "Boulder County" on Latitude 40 Degrees' Front Range Colorado Trails Recreation Topo Map.
See description "West Magnolia Area Trails" under "Multi-Use Trails" on Latitude 40 Degrees' Boulder County Colorado Trails Recreation Topo Map. 
See description "Magnolia Area (E & W))" under "West Map (Nederland) Trails" on Sky Terrain's map Boulder / Nederland.
See description "West Magnolia Trails (Nederland Area)" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
     
White Rocks Trail System. (City of Boulder Open Space and Mountain Parks.) CBOS&MP trailhead webpage. CBOS&MP trail system map.
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ee description "East Boulder Trails" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
     
Winiger Ridge Trail System. (US Forest Service.) USFS webpage.
See description "Winiger Ridge & Gulch FR 359" under "West Map (Nederland) Trails" on Sky Terrain's map Boulder / Nederland.
     
Woodland Lake Trail #811. USFS webpage. USFS quicksheet.
See description "Woodland Lake Trail #811" under "South Map Trails" on Sky Terrain's map Southern Rocky Mountain National Park / Indian Peaks Wilderness.
See trail description "Woodland Lake Trail 811" on Latitude 40 Degrees' Boulder / Nederland Colorado Trails Recreation Topo Map.
2.3 + approach +2,221 Moderate

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