USFS National Forest System Trails · Pike and San Isabel National Forests · Colorado · Updated June 2026
Triad Ridge Single Track (USFS trail 0425) is a 6.4 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 Triad Ridge Single Track?
| 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 |
This trail carries an accessibility designation in the USFS record.
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
Triad Ridge Single Track (USFS trail 0425) runs 6.4 mi through Pike and San Isabel National Forests in Colorado. 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. Underfoot, the trail is recorded as native material. USFS slope data puts it in the Intermediate band (grade band +10-12%), meaning a moderate climb — keep in mind this measures steepness, not trail technicality. For traditional mountain bikes, use is discouraged according to USFS data. 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, and the record carries an accessibility designation for this trail. 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 Triad Ridge Single Track?
- Mountain-bike use on Triad Ridge Single Track 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 Triad Ridge Single Track?
- Class 1, Class 2, Class 3 e-bikes are designated on Triad Ridge Single Track in the USFS data.
- How long is Triad Ridge Single Track?
- Triad Ridge Single Track measures about 6.4 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Triad Ridge Single Track?
- USFS data records the tread surface of Triad Ridge Single Track as native material.
- How difficult is Triad Ridge Single Track?
- 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 Pike and San Isabel National Forests (USFS trail geometry isn't mapped).
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