USFS National Forest System Trails · Willamette National Forest · Oregon · Updated June 2026
Castle Rock (USFS trail 3506) is a 4.4 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 Castle 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.
Watch Willamette National Forest for access changes
Email me when USFS mountain-bike or e-bike designations change for trails in Willamette National Forest. Free, unsubscribe anytime.
About this trail
In Willamette National Forest, Oregon, Castle Rock (USFS trail 3506) covers 4.4 mi of National Forest System trail. The figures here are pulled from the official US Forest Service trail data for Willamette 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 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. 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 Castle Rock?
- Yes. Mountain bikes are designated as allowed on Castle Rock in Willamette National Forest, typically Jun–Oct, per USFS data.
- Are e-bikes allowed on Castle Rock?
- No e-bike class (1, 2 or 3) is designated on Castle Rock in the USFS data.
- How long is Castle Rock?
- Castle Rock measures about 4.4 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Castle Rock?
- USFS data records the tread surface of Castle Rock as native material.
- How difficult is Castle 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).
Where to stay near Willamette National Forest
Find hotels, cabins, and vacation rentals near Willamette National Forest — plan your ride.
Top-rated places to stay near Willamette 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 Willamette National Forest?
Trail-access updates and trip ideas by email.