Easy/Intermediate
4.0 (4)
Local Club: Boulder Mountainbike Alliance
Jul 29, 2026: First North Foothills Reroute Segment is open
Jul 29, 2026: Boulder County Is Taking a Bigger-Picture Approach to Open Space Planning
Jul 29, 2026: After a six year stall, West Mag is getting new trails
Land Manager: Boulder County, CO - Parks and Open Space
Gunbarrel to Niwot: Cottontail Trail - Niwot Loop - LoBo Trail
15.9 mi 25.5 km • 496' Up 151.09 m Up • 567' Down 172.87 m Down
Gunbarrel, 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
Heil Ranch
8.9 mi 14.3 km • 982' Up 299.36 m Up • 979' Down 298.54 m Down
Lyons, CO
East Boulder Trail
12.2 mi 19.6 km • 611' Up 186.36 m Up • 611' Down 186.36 m Down
Gunbarrel, CO
Hall Ranch
11.8 mi 18.9 km • 1,750' Up 533.54 m Up • 1,750' Down 533.51 m Down
Lyons, CO
Dirty Bismark
15.7 mi 25.2 km • 933' Up 284.36 m Up • 929' Down 283.21 m Down
Superior, CO
Continue with onX Maps
Sign in with Facebook
Unknown
0 Comments