USFS National Forest System Trails · Sawtooth National Forest · Idaho · Updated June 2026
Iron Creek - Stanley Lake (USFS trail 7640) is a 14.5 mi trail in Sawtooth National Forest, Idaho. Mountain bikes are designated as allowed year-round, with Class 1 e-bikes also designated.
Can I bike Iron Creek - Stanley Lake?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | year-round |
| Class 1 e-bike (pedal-assist, 20 mph) | Allowed | May–Nov |
| Class 2 e-bike (throttle, 20 mph) | Allowed | May–Nov |
| Class 3 e-bike (pedal-assist, 28 mph) | Allowed | May–Nov |
Zooming out: across Sawtooth 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
Iron Creek - Stanley Lake (USFS trail 7640) runs 14.5 mi through Sawtooth National Forest in Idaho. The figures here are pulled from the official US Forest Service trail data for Sawtooth National Forest, covering the trail's mileage, tread, grade band, and the bike and e-bike uses the agency lists as designated. USFS records list its surface as native material. USFS slope data puts it in the Advanced band (grade band 12-20%), meaning a steep climb — keep in mind this measures steepness, not trail technicality. Mountain bikes are allowed, open year-round in the data. On the electric side, Class 1, Class 2, Class 3 e-bikes are also designated (May–Nov) — 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. 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 Iron Creek - Stanley Lake?
- Yes. Mountain bikes are designated as allowed on Iron Creek - Stanley Lake in Sawtooth National Forest, year-round, per USFS data.
- Are e-bikes allowed on Iron Creek - Stanley Lake?
- Class 1, Class 2, Class 3 e-bikes are designated on Iron Creek - Stanley Lake in the USFS data.
- How long is Iron Creek - Stanley Lake?
- Iron Creek - Stanley Lake measures about 14.5 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Iron Creek - Stanley Lake?
- USFS data records the tread surface of Iron Creek - Stanley Lake as native material.
- How difficult is Iron Creek - Stanley Lake?
- 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 Sawtooth National Forest (USFS trail geometry isn't mapped).
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