Intermediate
3.4 (18)
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: City of Boulder, Colorado - Parks and Recreation
Spring Brook Loop
12.6 mi 20.2 km • 943' Up 287.5 m Up • 943' Down 287.41 m Down
Superior, CO
Dirty Bismark
15.7 mi 25.2 km • 933' Up 284.36 m Up • 929' Down 283.21 m Down
Superior, CO
Down and Dirty
18.8 mi 30.3 km • 1,068' Up 325.44 m Up • 1,066' Down 324.88 m Down
Superior, CO
Marshall Mesa - Doudy Draw Loops
10.4 mi 16.8 km • 921' Up 280.63 m Up • 923' Down 281.18 m Down
Superior, CO
Valmont Bike Park - Singletrack Hotlap
2.0 mi 3.2 km • 78' Up 23.73 m Up • 79' Down 24 m Down
Boulder, CO
Chapman Drive Out-And-Back
11.2 mi 18.1 km • 1,330' Up 405.46 m Up • 1,330' Down 405.44 m Down
Boulder, CO
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