USFS National Forest System Trails · Pike and San Isabel National Forests · Colorado · Updated June 2026
Bighorn (USFS trail 1370.DA) is a 1 mi trail in Pike and San Isabel National Forests, Colorado. Mountain-bike use here is accepted but discouraged in USFS data, with Class 1 e-bikes also designated.
Can I bike Bighorn?
| 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 Pike and San Isabel National Forests, 51% of rideable trail miles are open to mountain bikes — a Bike Access Grade of B.
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About this trail
In Pike and San Isabel National Forests, Colorado, Bighorn (USFS trail 1370.DA) covers 1 mi of National Forest System trail. The figures here are pulled from the official US Forest Service trail data for Pike and San Isabel National Forests, covering the trail's mileage, tread, grade band, and the bike and e-bike uses the agency lists as designated. The tread is mapped as native material. USFS slope data puts it in the Expert band (grade band +20-30%), meaning a very steep climb — keep in mind this measures steepness, not trail technicality. Note that mountain-bike use here is discouraged in USFS records — confirm with the ranger district before riding. The record additionally permits Class 1, Class 2, Class 3 e-bike use; recall that Class 1 is pedal-assist, while Class 2 adds a throttle and Class 3 a higher cutoff 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. Treat this as a planning reference rather than a live conditions report, and verify any time-sensitive closure or order with the ranger district that manages Pike and San Isabel National Forests.
Frequently asked questions
- Can you mountain bike on Bighorn?
- Mountain-bike use on Bighorn 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 Bighorn?
- Class 1, Class 2, Class 3 e-bikes are designated on Bighorn in the USFS data.
- How long is Bighorn?
- Bighorn measures about 1 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Bighorn?
- USFS data records the tread surface of Bighorn as native material.
- How difficult is Bighorn?
- Its grade-based difficulty is Expert (grade band +20-30%), 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 Pike and San Isabel National Forests (USFS trail geometry isn't mapped).
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