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
We won't guess. Here is exactly what we do and don't know.
What we do know
Inside Arapaho and Roosevelt National Forests
2 managing-area boundaries mapped — agency alerts for them feed this page automatically.
Boundary data
What's missing
No access route mapped
We don't yet know which road reaches this trailhead, so we can't tell you if it's gated.
Nobody's filed a report here yet — be the first.
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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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