USFS National Forest System Trails · Colville National Forest · Washington · Updated June 2026
South Skookum Lake (USFS trail 138) is a 1.3 mi trail in Colville National Forest, Washington. Mountain bikes are designated as allowed year-round, with no Class 1 e-bike designation on record.
Can I bike South Skookum Lake?
| 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 Colville National Forest, 8% of rideable trail miles are open to mountain bikes — a Bike Access Grade of F.
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About this trail
South Skookum Lake (USFS trail 138) runs 1.3 mi through Colville National Forest in Washington. 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. 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. The agency lists no Class 1, 2 or 3 e-bike designation here; absent a local order to the contrary, that means e-bikes are not an allowed use on this trail. 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 South Skookum Lake?
- Yes. Mountain bikes are designated as allowed on South Skookum Lake in Colville National Forest, year-round, per USFS data.
- Are e-bikes allowed on South Skookum Lake?
- No e-bike class (1, 2 or 3) is designated on South Skookum Lake in the USFS data.
- How long is South Skookum Lake?
- South Skookum Lake measures about 1.3 mi in total, summed across its mapped National Forest System segments.
- What is the surface of South Skookum Lake?
- USFS data records the tread surface of South Skookum Lake as native material.
- How difficult is South Skookum Lake?
- 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 Colville National Forest (USFS trail geometry isn't mapped).
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