USFS National Forest System Trails · Grand Mesa, Uncompahgre and Gunnison National Forests · Colorado · Updated June 2026
Old Highway 90 Snowmobile (USFS trail SNO-5540) is a 7.2 mi trail in Grand Mesa, Uncompahgre and Gunnison National Forests, Colorado. Mountain bikes are designated as allowed, Jan–Mar, December, with no Class 1 e-bike designation on record.
Can I bike Old Highway 90 Snowmobile?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | Jan–Mar, December |
| Class 1 e-bike (pedal-assist, 20 mph) | — | |
| Class 2 e-bike (throttle, 20 mph) | — | |
| Class 3 e-bike (pedal-assist, 28 mph) | — |
Zooming out: across Grand Mesa, Uncompahgre and Gunnison National Forests, 96% of rideable trail miles are open to mountain bikes — a Bike Access Grade of A.
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About this trail
In Grand Mesa, Uncompahgre and Gunnison National Forests, Colorado, Old Highway 90 Snowmobile (USFS trail SNO-5540) covers 7.2 mi of National Forest System trail. 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 snow. 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. Mountain bikes are allowed, with a Jan–Mar, December season in the data. No e-bike class (1, 2 or 3) is designated on this trail in the USFS data, so treat it as a non-motorized route unless a posted order says otherwise. The route is mapped as USFS Trail Class 3 on the agency's 1-to-5 development scale, where 1 is the most primitive, minimally maintained tread and 5 is the most developed. Because conditions, closures, and local orders change between data refreshes, confirm the current status with the managing ranger district before you ride.
Frequently asked questions
- Can you mountain bike on Old Highway 90 Snowmobile?
- Yes. Mountain bikes are designated as allowed on Old Highway 90 Snowmobile in Grand Mesa, Uncompahgre and Gunnison National Forests, typically Jan–Mar, December, per USFS data.
- Are e-bikes allowed on Old Highway 90 Snowmobile?
- No e-bike class (1, 2 or 3) is designated on Old Highway 90 Snowmobile in the USFS data.
- How long is Old Highway 90 Snowmobile?
- Old Highway 90 Snowmobile measures about 7.2 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Old Highway 90 Snowmobile?
- USFS data records the tread surface of Old Highway 90 Snowmobile as snow.
- How difficult is Old Highway 90 Snowmobile?
- 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 Grand Mesa, Uncompahgre and Gunnison National Forests (USFS trail geometry isn't mapped).
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