USFS National Forest System Trails · Willamette National Forest · Oregon · Updated June 2026
King Castle (USFS trail 4326) is a 4.2 mi trail in Willamette National Forest, Oregon. Mountain bikes are designated as allowed, Apr–Oct, with no Class 1 e-bike designation on record.
Can I bike King Castle?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | Apr–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
King Castle (USFS trail 4326) runs 4.2 mi through Willamette National Forest in Oregon. 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. The tread is mapped as native material. Its grade-based difficulty is Advanced (grade band 12-20%) — a steep steepness profile derived from USFS slope data, not a technical mountain-bike rating. Mountain bikes are allowed, with a Apr–Oct 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 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. For day-of certainty on closures or seasonal orders, check directly with the ranger district, since this reflects the USFS data as of the latest refresh.
Frequently asked questions
- Can you mountain bike on King Castle?
- Yes. Mountain bikes are designated as allowed on King Castle in Willamette National Forest, typically Apr–Oct, per USFS data.
- Are e-bikes allowed on King Castle?
- No e-bike class (1, 2 or 3) is designated on King Castle in the USFS data.
- How long is King Castle?
- King Castle measures about 4.2 mi in total, summed across its mapped National Forest System segments.
- What is the surface of King Castle?
- USFS data records the tread surface of King Castle as native material.
- How difficult is King Castle?
- 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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