Intermediate
3.7 (6)
Local Club: Boulder Mountainbike Alliance
Nov 17, 2025: Trail Update: South St Vrain
Nov 14, 2025: Another Step Closer to new Betasso Connector
Oct 24, 2025: Boulder County Moves One Step Closer to a Safer Boulder-to-Betasso Connection
Land Manager: USFS - Boulder Ranger District Office
The Cougar Slayer
69.6 mi 112.0 km • 8,965' Up 2732.51 m Up • 11,815' Down 3601.28 m Down
Nederland, CO
West Magnolia: Winter Fat Bike Groomed Loop
4.6 mi 7.4 km • 253' Up 77.21 m Up • 255' Down 77.66 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
Rogers Pass Needle Out and Back
43.6 mi 70.1 km • 3,907' Up 1190.86 m Up • 3,907' Down 1190.94 m Down
Winter…, 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
Walker Ranch
7.8 mi 12.6 km • 1,516' Up 462.02 m Up • 1,510' Down 460.32 m Down
Coal Creek, CO
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