Lostfork Basecamp
Mountain Biking business nearby (~42 mi away) — hasn't claimed their Roamze page yet
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Colorado
8.2 mi
Distance
1h 22m
Time
Excellent conditions for mountain biking today
Checked 8/11/2026 · openweather, snotel, scoring_engine
Weather is ideal with mild temperatures, light winds, and zero precipitation expected. The scoring engine rates conditions at 99/100 for mountain biking, and no snow is present at the nearest elevation. Trails should be dry and rideable.
Why you'll love it
Sourdough
AI-suggested draft · review before you go
Sourdough is a challenging 8.2-mile mountain biking trail located in the Boulder area of Colorado. This difficult trail offers an extended ride through the scenic foothills near 40.1°N 105.6°W, providing experienced riders with a substantial workout and technical challenges. The length and difficulty rating make it ideal for intermediate to advanced riders looking to test their skills on a longer Colorado classic.
No permit or access details on file for this trail — check with the local land manager before you go.
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South Saint Vrain
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Local operatorsoffering guided trips. You book directly with them — Roamze doesn’t take a cut.
Lostfork Basecamp
Mountain Biking business nearby (~42 mi away) — hasn't claimed their Roamze page yet