“A rowdy, rocky descent and an alternate line to North Sourdough. ”
2.3
Miles3.7
KMSingletrack
Local Club: Boulder Mountainbike Alliance
Oct 15, 2026: South Boulder Trail Connection: What Happened at OSBT and What’s Next
Sep 29, 2026: Where Boulder’s 2026 Candidates Stand on Bike Issues
Sep 23, 2026: More Voices at the Table: BMA Supports Ballot Question 200
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
25.3 mi 40.7 km • 1,949' Up 593.94 m Up • 1,948' Down 593.78 m Down
18.1 mi 29.1 km • 2,135' Up 650.8 m Up • 2,136' Down 650.93 m Down
4.6 mi 7.4 km • 253' Up 77.21 m Up • 255' Down 77.66 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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