USFS National Forest System Trails · George Washington and Jefferson National Forest · Virginia · Updated June 2026
Iron Mountain Spur A (USFS trail 4641) is a 0.7 mi trail in George Washington and Jefferson National Forest, Virginia. Mountain bikes are designated as allowed year-round, with Class 1 e-bikes also designated.
Can I bike Iron Mountain Spur A?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | year-round |
| Class 1 e-bike (pedal-assist, 20 mph) | Allowed | year-round |
| Class 2 e-bike (throttle, 20 mph) | Allowed | year-round |
| Class 3 e-bike (pedal-assist, 28 mph) | Allowed | year-round |
Zooming out: across George Washington and Jefferson National Forest, 90% of rideable trail miles are open to mountain bikes — a Bike Access Grade of A.
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About this trail
Iron Mountain Spur A (USFS trail 4641) runs 0.7 mi through George Washington and Jefferson National Forest in Virginia. 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. USFS records list its surface as native material. Based on slope, this is a Intermediate trail (grade band +10-12%); that reflects moderate gradient and is not the same as a technical MTB difficulty rating. Bike use is designated as allowed year-round. On the electric side, Class 1, Class 2, Class 3 e-bikes are also designated — Class 1 being pedal-assist only, Classes 2 and 3 adding a throttle and higher assisted speed. 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 Iron Mountain Spur A?
- Yes. Mountain bikes are designated as allowed on Iron Mountain Spur A in George Washington and Jefferson National Forest, year-round, per USFS data.
- Are e-bikes allowed on Iron Mountain Spur A?
- Class 1, Class 2, Class 3 e-bikes are designated on Iron Mountain Spur A in the USFS data.
- How long is Iron Mountain Spur A?
- Iron Mountain Spur A measures about 0.7 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Iron Mountain Spur A?
- USFS data records the tread surface of Iron Mountain Spur A as native material.
- How difficult is Iron Mountain Spur A?
- Its grade-based difficulty is Intermediate (grade band +10-12%), 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 George Washington and Jefferson National Forest (USFS trail geometry isn't mapped).
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