USFS National Forest System Trails · Salmon-Challis National Forest · Idaho · Updated June 2026
Middle Fork Little Timber Cr. (USFS trail 6187) is a 3.5 mi trail in Salmon-Challis National Forest, Idaho. Mountain bikes are designated as allowed year-round, with Class 1 e-bikes also designated.
Can I bike Middle Fork Little Timber Cr.?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | year-round |
| 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 Salmon-Challis National Forest, 26% of rideable trail miles are open to mountain bikes — a Bike Access Grade of C.
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About this trail
Middle Fork Little Timber Cr. (USFS trail 6187) runs 3.5 mi through Salmon-Challis National Forest in Idaho. 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 Advanced (grade band +12-20%) — a steep steepness profile derived from USFS slope data, not a technical mountain-bike rating. Mountain bikes are allowed, open year-round in the 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 3 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 Middle Fork Little Timber Cr.?
- Yes. Mountain bikes are designated as allowed on Middle Fork Little Timber Cr. in Salmon-Challis National Forest, year-round, per USFS data.
- Are e-bikes allowed on Middle Fork Little Timber Cr.?
- Class 1, Class 2, Class 3 e-bikes are designated on Middle Fork Little Timber Cr. in the USFS data.
- How long is Middle Fork Little Timber Cr.?
- Middle Fork Little Timber Cr. measures about 3.5 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Middle Fork Little Timber Cr.?
- USFS data records the tread surface of Middle Fork Little Timber Cr. as native material.
- How difficult is Middle Fork Little Timber Cr.?
- 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 Salmon-Challis National Forest (USFS trail geometry isn't mapped).
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