USFS National Forest System Trails · Arapaho and Roosevelt National Forests · Colorado · Updated June 2026
Box Hollow (USFS trail 991.4) is a 0.7 mi trail in Arapaho and Roosevelt National Forests, Colorado. Mountain bikes are designated as allowed, Jul–Oct, with no Class 1 e-bike designation on record.
Can I bike Box Hollow?
| 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 Arapaho and Roosevelt National Forests, 99% of rideable trail miles are open to mountain bikes — a Bike Access Grade of A.
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About this trail
Box Hollow (USFS trail 991.4) runs 0.7 mi through Arapaho and Roosevelt National Forests in Colorado. The figures here are pulled from the official US Forest Service trail data for Arapaho and Roosevelt National Forests, covering the trail's mileage, tread, grade band, and the bike and e-bike uses the agency lists as designated. USFS records list its surface as native material. Based on slope, this is a Intermediate trail (grade band +10-12%); that reflects moderate gradient and is not the same as a technical MTB difficulty rating. Bike use is designated as allowed, typically Jul–Oct. 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. 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 Box Hollow?
- Yes. Mountain bikes are designated as allowed on Box Hollow in Arapaho and Roosevelt National Forests, typically Jul–Oct, per USFS data.
- Are e-bikes allowed on Box Hollow?
- No e-bike class (1, 2 or 3) is designated on Box Hollow in the USFS data.
- How long is Box Hollow?
- Box Hollow measures about 0.7 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Box Hollow?
- USFS data records the tread surface of Box Hollow as native material.
- How difficult is Box Hollow?
- 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 Arapaho and Roosevelt National Forests (USFS trail geometry isn't mapped).
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