“A rowdy, rocky descent and an alternate line to North Sourdough. ”
2.3
Miles3.7
KMSingletrack
Local Club: Boulder Mountainbike Alliance
Sep 23, 2026: More Voices at the Table: BMA Supports Ballot Question 200
Sep 2, 2026: What Do You Want to Ask Boulder’s Candidates?
Aug 24, 2026: From the Bike Ban to South Sky: 43 Years in the Making
Land Manager: USFS - Boulder Ranger District Office
5.4 mi 8.7 km • 641' Up 195.34 m Up • 650' Down 198.23 m Down
26.7 mi 43.0 km • 2,883' Up 878.83 m Up • 2,899' Down 883.5 m Down
25.3 mi 40.7 km • 1,949' Up 593.94 m Up • 1,948' Down 593.78 m Down
69.6 mi 112.0 km • 8,965' Up 2732.51 m Up • 11,815' Down 3601.28 m Down
10.1 mi 16.3 km • 2,101' Up 640.44 m Up • 2,101' Down 640.24 m Down
14.1 mi 22.6 km • 1,549' Up 472.24 m Up • 1,550' Down 472.41 m Down
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