USFS National Forest System Trails · Willamette National Forest · Oregon · Updated June 2026
Larison Rock (USFS trail 3607) is a 3.9 mi trail in Willamette National Forest, Oregon. Mountain bikes are designated as allowed, Jun–Oct, with no Class 1 e-bike designation on record.
Can I bike Larison Rock?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | Jun–Oct |
| 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 Willamette National Forest, 41% of rideable trail miles are open to mountain bikes — a Bike Access Grade of C.
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About this trail
Larison Rock (USFS trail 3607) runs 3.9 mi through Willamette National Forest in Oregon. 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. USFS records list its surface as native material. Based on slope, this is a Advanced trail (grade band 12-20%); that reflects steep gradient and is not the same as a technical MTB difficulty rating. Bike use is designated as allowed, typically Jun–Oct. 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. 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 Willamette National Forest.
Frequently asked questions
- Can you mountain bike on Larison Rock?
- Yes. Mountain bikes are designated as allowed on Larison Rock in Willamette National Forest, typically Jun–Oct, per USFS data.
- Are e-bikes allowed on Larison Rock?
- No e-bike class (1, 2 or 3) is designated on Larison Rock in the USFS data.
- How long is Larison Rock?
- Larison Rock measures about 3.9 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Larison Rock?
- USFS data records the tread surface of Larison Rock as native material.
- How difficult is Larison Rock?
- 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 Willamette National Forest (USFS trail geometry isn't mapped).
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