USFS National Forest System Trails · Deschutes National Forest · Oregon · Updated June 2026
Arnold Ice Cave (USFS trail 3963) is a 14.6 mi trail in Deschutes National Forest, Oregon. Mountain bikes are designated as allowed year-round, with no Class 1 e-bike designation on record.
Can I bike Arnold Ice Cave?
| 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 Deschutes National Forest, 59% of rideable trail miles are open to mountain bikes — a Bike Access Grade of B.
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About this trail
In Deschutes National Forest, Oregon, Arnold Ice Cave (USFS trail 3963) covers 14.6 mi of National Forest System trail. 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. The tread is mapped as native material. No grade band is recorded, so a steepness-based difficulty isn't available for this trail. Mountain bikes are allowed, open year-round in the data. No e-bike class (1, 2 or 3) is designated on this trail in the USFS data, so treat it as a non-motorized route unless a posted order says otherwise. 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 Deschutes National Forest.
Frequently asked questions
- Can you mountain bike on Arnold Ice Cave?
- Yes. Mountain bikes are designated as allowed on Arnold Ice Cave in Deschutes National Forest, year-round, per USFS data.
- Are e-bikes allowed on Arnold Ice Cave?
- No e-bike class (1, 2 or 3) is designated on Arnold Ice Cave in the USFS data.
- How long is Arnold Ice Cave?
- Arnold Ice Cave measures about 14.6 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Arnold Ice Cave?
- USFS data records the tread surface of Arnold Ice Cave as native material.
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 Deschutes National Forest (USFS trail geometry isn't mapped).
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