USFS National Forest System Trails · Salmon-Challis National Forest · Idaho · Updated June 2026
Lightning Creek (USFS trail 4156) is a 9.7 mi trail in Salmon-Challis National Forest, Idaho. Mountain bikes are designated as allowed year-round, with no Class 1 e-bike designation on record.
Can I bike Lightning Creek?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | year-round |
| Class 1 e-bike (pedal-assist, 20 mph) | Restricted | — |
| Class 2 e-bike (throttle, 20 mph) | Restricted | — |
| Class 3 e-bike (pedal-assist, 28 mph) | Restricted | — |
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
In Salmon-Challis National Forest, Idaho, Lightning Creek (USFS trail 4156) covers 9.7 mi of National Forest System trail. 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. The tread is mapped as native material. USFS slope data puts it in the Advanced band (grade band +12-20%), meaning a steep climb — keep in mind this measures steepness, not trail technicality. Mountain bikes are allowed, open year-round in the data. No e-bike class (1, 2 or 3) is designated on this trail in the USFS data, so treat it as a non-motorized route unless a posted order says otherwise. 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 Lightning Creek?
- Yes. Mountain bikes are designated as allowed on Lightning Creek in Salmon-Challis National Forest, year-round, per USFS data.
- Are e-bikes allowed on Lightning Creek?
- No e-bike class (1, 2 or 3) is designated on Lightning Creek in the USFS data.
- How long is Lightning Creek?
- Lightning Creek measures about 9.7 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Lightning Creek?
- USFS data records the tread surface of Lightning Creek as native material.
- How difficult is Lightning Creek?
- 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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