The Dirty Bismark

Boulder, Colorado 80307

The Dirty Bismark

The Dirty Bismark Professional Review and Guide

"An all-dirt twist on a classic road ride, this relatively new course is symbolic of the rise of off-road cycling in a roadies’ paradise. Suitable for beginners, populated by the pros of Boulder."

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Trail Information

Boulder
Nearby City
14
Distance
Out-and-back
Trail Type
Easy to Difficult
Technical Difficulty
Easy to Difficult
Physical Difficulty
Rolling hills. Rocky singletrack, smooth widetrack, and some dirt road sections. Significant technical challenges are few and far between.
Terrain
1–2 hours
Duration
Year-round
Season
USGS Quad Louisville
Local Maps

Activity Feed

Nov 2018