USFS National Forest System Trails · Pike and San Isabel National Forests · Colorado · Updated June 2026
Williams Pass 4wd Trail (USFS trail 298.A) is a 1.7 mi trail in Pike and San Isabel National Forests, Colorado. Mountain bikes are designated as allowed year-round, with Class 1 e-bikes also designated.
Can I bike Williams Pass 4wd Trail?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | year-round |
| Class 1 e-bike (pedal-assist, 20 mph) | Allowed | September |
| Class 2 e-bike (throttle, 20 mph) | Allowed | September |
| Class 3 e-bike (pedal-assist, 28 mph) | Allowed | September |
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
Williams Pass 4wd Trail (USFS trail 298.A) runs 1.7 mi through Pike and San Isabel National Forests in Colorado. This profile summarizes what the official US Forest Service trail record says about riding it: how long the trail is, what it's built on, how steep the route grades out, and which forms of bike use the agency has designated. Underfoot, the trail is recorded as native material. Its grade-based difficulty is Intermediate (grade band +8-10%) — a moderate steepness profile derived from USFS slope data, not a technical mountain-bike rating. Mountain bikes are allowed, open year-round in the data. The record additionally permits Class 1, Class 2, Class 3 e-bike use, September; 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 Williams Pass 4wd Trail?
- Yes. Mountain bikes are designated as allowed on Williams Pass 4wd Trail in Pike and San Isabel National Forests, year-round, per USFS data.
- Are e-bikes allowed on Williams Pass 4wd Trail?
- Class 1, Class 2, Class 3 e-bikes are designated on Williams Pass 4wd Trail in the USFS data.
- How long is Williams Pass 4wd Trail?
- Williams Pass 4wd Trail measures about 1.7 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Williams Pass 4wd Trail?
- USFS data records the tread surface of Williams Pass 4wd Trail as native material.
- How difficult is Williams Pass 4wd Trail?
- Its grade-based difficulty is Intermediate (grade band +8-10%), 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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