USFS National Forest System Trails · Sierra National Forest · California · Updated June 2026
Silver S (USFS trail 21E238) is a 0.6 mi trail in Sierra National Forest, California. Mountain-bike use here is restricted in USFS data, with Class 1 e-bikes also designated.
Can I bike Silver S?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Restricted | — |
| Class 1 e-bike (pedal-assist, 20 mph) | Allowed | January, Mar–Dec |
| Class 2 e-bike (throttle, 20 mph) | Allowed | January, Mar–Dec |
| Class 3 e-bike (pedal-assist, 28 mph) | Allowed | January, Mar–Dec |
Zooming out: across Sierra National Forest, 0% of rideable trail miles are open to mountain bikes — a Bike Access Grade of F.
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About this trail
Silver S (USFS trail 21E238) runs 0.6 mi through Sierra National Forest in California. 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. USFS records list its surface as native material. USFS slope data puts it in the Intermediate band (grade band 10-12%), meaning a moderate climb — keep in mind this measures steepness, not trail technicality. Note that mountain-bike use here is restricted in USFS records — confirm with the ranger district before riding. The record additionally permits Class 1, Class 2, Class 3 e-bike use, January, Mar–Dec; 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 Sierra National Forest.
Frequently asked questions
- Can you mountain bike on Silver S?
- Mountain-bike use on Silver S is restricted in USFS records, though Class 1 e-bike use is designated. Confirm current rules with the managing ranger district.
- Are e-bikes allowed on Silver S?
- Class 1, Class 2, Class 3 e-bikes are designated on Silver S in the USFS data.
- How long is Silver S?
- Silver S measures about 0.6 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Silver S?
- USFS data records the tread surface of Silver S as native material.
- How difficult is Silver S?
- 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 Sierra National Forest (USFS trail geometry isn't mapped).
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