USFS National Forest System Trails · Medicine Bow-Routt National Forest · Colorado · Updated June 2026
Willow Pass (USFS trail 1226.1D) is a 2.1 mi trail in Medicine Bow-Routt National Forest, Colorado. Mountain-bike use here is accepted but discouraged in USFS data, with Class 1 e-bikes also designated.
Can I bike Willow Pass?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Accepted but discouraged | — |
| Class 1 e-bike (pedal-assist, 20 mph) | Allowed | year-round |
| Class 2 e-bike (throttle, 20 mph) | Allowed | year-round |
| Class 3 e-bike (pedal-assist, 28 mph) | Allowed | year-round |
Zooming out: across Medicine Bow-Routt National Forest, 14% of rideable trail miles are open to mountain bikes — a Bike Access Grade of D.
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About this trail
Willow Pass (USFS trail 1226.1D) runs 2.1 mi through Medicine Bow-Routt National Forest in Colorado. Everything below comes straight from the US Forest Service National Forest System Trails dataset — length, surface, slope-derived difficulty, and the specific bike and e-bike designations on record — so you can check legality before you load up. The tread is mapped as native material. Its grade-based difficulty is Advanced (grade band 12-20%) — a steep steepness profile derived from USFS slope data, not a technical mountain-bike rating. Note that mountain-bike use here is discouraged in USFS records — confirm with the ranger district before riding. On the electric side, Class 1, Class 2, Class 3 e-bikes are also designated — Class 1 being pedal-assist only, Classes 2 and 3 adding a throttle and higher assisted speed. The route is mapped as USFS Trail Class 2 on the agency's 1-to-5 development scale, where 1 is the most primitive, minimally maintained tread and 5 is the most developed. For day-of certainty on closures or seasonal orders, check directly with the ranger district, since this reflects the USFS data as of the latest refresh.
Frequently asked questions
- Can you mountain bike on Willow Pass?
- Mountain-bike use on Willow Pass is discouraged in USFS records, though Class 1 e-bike use is designated. Confirm current rules with the managing ranger district.
- Are e-bikes allowed on Willow Pass?
- Class 1, Class 2, Class 3 e-bikes are designated on Willow Pass in the USFS data.
- How long is Willow Pass?
- Willow Pass measures about 2.1 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Willow Pass?
- USFS data records the tread surface of Willow Pass as native material.
- How difficult is Willow Pass?
- Its grade-based difficulty is Advanced (grade band 12-20%), derived from USFS slope data. This reflects steepness, not technical mountain-bike difficulty.
How we read this data
Grade-based difficulty above is the USFS grade (route steepness), not a technical mountain-bike rating — a gentle-grade trail can still be rocky or technical, and vice versa. Bike and e-bike status come verbatim from the USFS managed-use fields for this trail; we never infer access we can't cite. See our methodology for how the dataset is built and what each field means.
Where it is
Approximate location of Medicine Bow-Routt National Forest (USFS trail geometry isn't mapped).
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