Intermediate/Difficult
3.3 (7)
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
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
The N Bus Loop
13.0 mi 21.0 km • 1,490' Up 454.13 m Up • 1,489' Down 453.83 m Down
Nederland, CO
Rhythm & Blues
10.3 mi 16.6 km • 825' Up 251.57 m Up • 825' Down 251.49 m Down
Nederland, 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
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
Maryland Mountain Complete Tour
12.4 mi 20.0 km • 1,807' Up 550.77 m Up • 1,811' Down 552.05 m Down
Central…, CO
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