“The first half of the Spring Brook Loop if riding clockwise - a rocky climb leading into the forest. ”
1.1
Miles1.8
KMSingletrack
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: Boulder County, CO - Parks and Open Space
8.4 mi 13.5 km • 705' Up 214.85 m Up • 706' Down 215.04 m Down
6.5 mi 10.4 km • 253' Up 77.06 m Up • 252' Down 76.87 m Down
16.3 mi 26.2 km • 1,788' Up 545.03 m Up • 1,788' Down 544.87 m Down
11.8 mi 18.9 km • 301' Up 91.78 m Up • 305' Down 93.04 m Down
7.1 mi 11.5 km • 768' Up 234.03 m Up • 759' Down 231.27 m Down
7.5 mi 12.0 km • 883' Up 269.03 m Up • 934' Down 284.79 m Down
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