USFS National Forest System Trails · Kaibab National Forest · Arizona · Updated June 2026
Great Western Trail (USFS trail 150) is a 145 mi trail in Kaibab National Forest, Arizona. Mountain-bike use here is accepted but discouraged in USFS data, with Class 1 e-bikes also designated.
Can I bike Great Western Trail?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Accepted but discouraged | — |
| Class 1 e-bike (pedal-assist, 20 mph) | Allowed | May–Nov |
| Class 2 e-bike (throttle, 20 mph) | Allowed | May–Nov |
| Class 3 e-bike (pedal-assist, 28 mph) | Allowed | May–Nov |
Zooming out: across Kaibab National Forest, 48% of rideable trail miles are open to mountain bikes — a Bike Access Grade of B.
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About this trail
Great Western Trail (USFS trail 150) is a 145 mi trail in Kaibab National Forest, Arizona. Everything below comes straight from the US Forest Service National Forest System Trails dataset — length, surface, slope-derived difficulty, and the specific bike and e-bike designations on record — so you can check legality before you load up. 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. 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, May–Nov; 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 4 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 Great Western Trail?
- Mountain-bike use on Great Western Trail 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 Great Western Trail?
- Class 1, Class 2, Class 3 e-bikes are designated on Great Western Trail in the USFS data.
- How long is Great Western Trail?
- Great Western Trail measures about 145 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Great Western Trail?
- USFS data records the tread surface of Great Western Trail as native material.
- How difficult is Great Western Trail?
- 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 Kaibab National Forest (USFS trail geometry isn't mapped).
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