USFS National Forest System Trails · Lassen National Forest · California · Updated June 2026
Eagle Lake South Shore (USFS trail 9766) is a 4.5 mi trail in Lassen National Forest, California. Mountain bikes are designated as allowed, Apr–Dec, with no Class 1 e-bike designation on record.
Can I bike Eagle Lake South Shore?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | Apr–Dec |
| 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 | — |
This trail carries an accessibility designation in the USFS record.
Zooming out: across Lassen National Forest, 35% of rideable trail miles are open to mountain bikes — a Bike Access Grade of C.
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About this trail
In Lassen National Forest, California, Eagle Lake South Shore (USFS trail 9766) covers 4.5 mi of National Forest System trail. 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. The tread is mapped as asphalt. USFS slope data puts it in the Easy band (grade band 5-8%), meaning a gentle climb — keep in mind this measures steepness, not trail technicality. Mountain bikes are allowed, with a Apr–Dec season 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 4 on the agency's 1-to-5 development scale, where 1 is the most primitive, minimally maintained tread and 5 is the most developed, and the record carries an accessibility designation for this trail. 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 Lassen National Forest.
Frequently asked questions
- Can you mountain bike on Eagle Lake South Shore?
- Yes. Mountain bikes are designated as allowed on Eagle Lake South Shore in Lassen National Forest, typically Apr–Dec, per USFS data.
- Are e-bikes allowed on Eagle Lake South Shore?
- No e-bike class (1, 2 or 3) is designated on Eagle Lake South Shore in the USFS data.
- How long is Eagle Lake South Shore?
- Eagle Lake South Shore measures about 4.5 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Eagle Lake South Shore?
- USFS data records the tread surface of Eagle Lake South Shore as asphalt.
- How difficult is Eagle Lake South Shore?
- Its grade-based difficulty is Easy (grade band 5-8%), 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 Lassen National Forest (USFS trail geometry isn't mapped).
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