USFS National Forest System Trails · Idaho Panhandle National Forests · Idaho · Updated June 2026
Little No. Fork 4wd (USFS trail 133A) is a 3.3 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 Little No. Fork 4wd?
| 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
Little No. Fork 4wd (USFS trail 133A) is a 3.3 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 trail surface is not specified in the USFS record. Its grade-based difficulty is Advanced (grade band 12-20%) — a steep steepness profile derived from USFS slope data, not a technical mountain-bike rating. 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. 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 Little No. Fork 4wd?
- Mountain-bike use on Little No. Fork 4wd 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 Little No. Fork 4wd?
- Class 1, Class 2, Class 3 e-bikes are designated on Little No. Fork 4wd in the USFS data.
- How long is Little No. Fork 4wd?
- Little No. Fork 4wd measures about 3.3 mi in total, summed across its mapped National Forest System segments.
- How difficult is Little No. Fork 4wd?
- Its grade-based difficulty is Advanced (grade band 12-20%), 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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