Intermediate/Difficult
4.9 (12)
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
East Boulder Trail
12.2 mi 19.6 km • 611' Up 186.36 m Up • 611' Down 186.36 m Down
Gunbarrel, CO
Betasso Preserve
7.1 mi 11.5 km • 768' Up 234.03 m Up • 759' Down 231.27 m Down
Boulder, 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
Heil Outer Loop from Corral TH
14.1 mi 22.6 km • 1,549' Up 472.24 m Up • 1,550' Down 472.41 m Down
Lyons, CO
Rocky Flats NWR North
6.5 mi 10.4 km • 253' Up 77.06 m Up • 252' Down 76.87 m Down
Superior, CO
Heil to Picture to Hall and Back
34.1 mi 54.9 km • 3,648' Up 1111.87 m Up • 3,648' Down 1111.94 m Down
Lyons, CO
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