USFS National Forest System Trails · Shasta-Trinity National Forest · California · Updated June 2026
Marble Caves (USFS trail 07E36) is a 3.1 mi trail in Shasta-Trinity National Forest, California. Mountain bikes are designated as allowed year-round, with no Class 1 e-bike designation on record.
Can I bike Marble Caves?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | year-round |
| Class 1 e-bike (pedal-assist, 20 mph) | — | |
| Class 2 e-bike (throttle, 20 mph) | — | |
| Class 3 e-bike (pedal-assist, 28 mph) | — |
Zooming out: across Shasta-Trinity National Forest, 77% of rideable trail miles are open to mountain bikes — a Bike Access Grade of A.
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About this trail
Marble Caves (USFS trail 07E36) is a 3.1 mi trail in Shasta-Trinity National Forest, California. The figures here are pulled from the official US Forest Service trail data for Shasta-Trinity National Forest, covering the trail's mileage, tread, grade band, and the bike and e-bike uses the agency lists as designated. USFS records list its surface 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. 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 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 Marble Caves?
- Yes. Mountain bikes are designated as allowed on Marble Caves in Shasta-Trinity National Forest, year-round, per USFS data.
- Are e-bikes allowed on Marble Caves?
- No e-bike class (1, 2 or 3) is designated on Marble Caves in the USFS data.
- How long is Marble Caves?
- Marble Caves measures about 3.1 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Marble Caves?
- USFS data records the tread surface of Marble Caves as native material.
- How difficult is Marble Caves?
- 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 Shasta-Trinity National Forest (USFS trail geometry isn't mapped).
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