USFS National Forest System Trails · Uinta-Wasatch-Cache National Forest · Utah · Updated June 2026
Bear River-Smith Fork (USFS trail 4091) is a 17.5 mi trail in Uinta-Wasatch-Cache National Forest, Utah. Mountain bikes are designated as allowed, Jul–Oct, with no Class 1 e-bike designation on record.
Can I bike Bear River-Smith Fork?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | Jul–Oct |
| Class 1 e-bike (pedal-assist, 20 mph) | Restricted | — |
| Class 2 e-bike (throttle, 20 mph) | Restricted | — |
| Class 3 e-bike (pedal-assist, 28 mph) | Restricted | — |
Zooming out: across Uinta-Wasatch-Cache National Forest, 83% of rideable trail miles are open to mountain bikes — a Bike Access Grade of A.
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About this trail
Bear River-Smith Fork (USFS trail 4091) is a 17.5 mi trail in Uinta-Wasatch-Cache National Forest, Utah. The figures here are pulled from the official US Forest Service trail data for Uinta-Wasatch-Cache National Forest, covering the trail's mileage, tread, grade band, and the bike and e-bike uses the agency lists as designated. Underfoot, the trail is recorded as native material. Its grade-based difficulty is Intermediate (grade band +10-12%) — a moderate steepness profile derived from USFS slope data, not a technical mountain-bike rating. Mountain bikes are allowed, with a Jul–Oct season in the data. The agency lists no Class 1, 2 or 3 e-bike designation here; absent a local order to the contrary, that means e-bikes are not an allowed use on this trail. 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 Bear River-Smith Fork?
- Yes. Mountain bikes are designated as allowed on Bear River-Smith Fork in Uinta-Wasatch-Cache National Forest, typically Jul–Oct, per USFS data.
- Are e-bikes allowed on Bear River-Smith Fork?
- No e-bike class (1, 2 or 3) is designated on Bear River-Smith Fork in the USFS data.
- How long is Bear River-Smith Fork?
- Bear River-Smith Fork measures about 17.5 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Bear River-Smith Fork?
- USFS data records the tread surface of Bear River-Smith Fork as native material.
- How difficult is Bear River-Smith Fork?
- Its grade-based difficulty is Intermediate (grade band +10-12%), 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 Uinta-Wasatch-Cache National Forest (USFS trail geometry isn't mapped).
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