USFS National Forest System Trails · Inyo National Forest · California · Updated June 2026
Mammoth Rock (USFS trail 2725) is a 2.5 mi trail in Inyo National Forest, California. Mountain bikes are designated as allowed year-round, with no Class 1 e-bike designation on record.
Can I bike Mammoth Rock?
| 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 Inyo National Forest, 7% of rideable trail miles are open to mountain bikes — a Bike Access Grade of F.
Watch Inyo National Forest for access changes
Email me when USFS mountain-bike or e-bike designations change for trails in Inyo National Forest. Free, unsubscribe anytime.
About this trail
In Inyo National Forest, California, Mammoth Rock (USFS trail 2725) covers 2.5 mi of National Forest System trail. The figures here are pulled from the official US Forest Service trail data for Inyo National Forest, covering the trail's mileage, tread, grade band, and the bike and e-bike uses the agency lists as designated. The tread is mapped as native material. Based on slope, this is a Intermediate trail (grade band 8-10%); that reflects moderate gradient and is not the same as a technical MTB difficulty 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 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. 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 Inyo National Forest.
Frequently asked questions
- Can you mountain bike on Mammoth Rock?
- Yes. Mountain bikes are designated as allowed on Mammoth Rock in Inyo National Forest, year-round, per USFS data.
- Are e-bikes allowed on Mammoth Rock?
- No e-bike class (1, 2 or 3) is designated on Mammoth Rock in the USFS data.
- How long is Mammoth Rock?
- Mammoth Rock measures about 2.5 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Mammoth Rock?
- USFS data records the tread surface of Mammoth Rock as native material.
- How difficult is Mammoth Rock?
- Its grade-based difficulty is Intermediate (grade band 8-10%), 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 Inyo National Forest (USFS trail geometry isn't mapped).
Where to stay near Inyo National Forest
Find hotels, cabins, and vacation rentals near Inyo National Forest — plan your ride.
Top-rated places to stay near Inyo National Forest
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Riding Inyo National Forest?
Trail-access updates and trip ideas by email.