USFS National Forest System Trails · Idaho Panhandle National Forests · Idaho · Updated June 2026
St Joe Divide Spur (USFS trail 16B) is a 4.7 mi trail in Idaho Panhandle National Forests, Idaho. Mountain-bike use here is accepted but discouraged in USFS data, with Class 1 e-bikes also designated.
Can I bike St Joe Divide Spur?
| 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 Idaho Panhandle National Forests, 6% of rideable trail miles are open to mountain bikes — a Bike Access Grade of F.
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About this trail
St Joe Divide Spur (USFS trail 16B) is a 4.7 mi trail in Idaho Panhandle National Forests, Idaho. The figures here are pulled from the official US Forest Service trail data for Idaho Panhandle 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. 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; 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 Idaho Panhandle National Forests.
Frequently asked questions
- Can you mountain bike on St Joe Divide Spur?
- Mountain-bike use on St Joe Divide Spur 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 St Joe Divide Spur?
- Class 1, Class 2, Class 3 e-bikes are designated on St Joe Divide Spur in the USFS data.
- How long is St Joe Divide Spur?
- St Joe Divide Spur measures about 4.7 mi in total, summed across its mapped National Forest System segments.
- What is the surface of St Joe Divide Spur?
- USFS data records the tread surface of St Joe Divide Spur as native material.
- How difficult is St Joe Divide Spur?
- 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 Idaho Panhandle National Forests (USFS trail geometry isn't mapped).
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