Intermediate/Difficult
3.8 (10)
Local Club: Boulder Mountainbike Alliance
Oct 23, 2026: Hidden Valley and Degge trails are officially open to bikes!
Oct 20, 2026: Boulder County Commissioners Designate Trail Through Tucker Complex
Oct 15, 2026: South Boulder Trail Connection: What Happened at OSBT and What’s Next
Land Manager: USFS - Boulder Ranger District Office
Ceran St. Vrain to Miller Rock
6.2 mi 9.9 km • 897' Up 273.36 m Up • 897' Down 273.36 m Down
Nederland, CO
North Sourdough and St. Vrain Loop
5.4 mi 8.7 km • 641' Up 195.34 m Up • 650' Down 198.23 m Down
Nederland, CO
Sugarloaf to Gordon Gulch Loop
13.5 mi 21.7 km • 1,590' Up 484.64 m Up • 1,607' Down 489.88 m Down
Boulder, CO
Heil Ranch
8.9 mi 14.3 km • 982' Up 299.36 m Up • 979' Down 298.54 m Down
Lyons, CO
Sourdough - Eldora - Nederland Loop
26.7 mi 43.0 km • 2,883' Up 878.83 m Up • 2,899' Down 883.5 m Down
Nederland, CO
Sherwood From Nederland
5.8 mi 9.3 km • 789' Up 240.44 m Up • 793' Down 241.57 m Down
Nederland, CO
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