USFS National Forest System Trails · Caribou-Targhee National Forest · Idaho · Updated June 2026
Alleman (USFS trail 3577) is a 1.4 mi trail in Caribou-Targhee National Forest, Idaho. Mountain bikes are designated as allowed year-round, with Class 1 e-bikes also designated.
Can I bike Alleman?
| 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 Caribou-Targhee National Forest, 98% of rideable trail miles are open to mountain bikes — a Bike Access Grade of A.
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About this trail
Alleman (USFS trail 3577) is a 1.4 mi trail in Caribou-Targhee National Forest, Idaho. 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. 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, open year-round in the data. 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. 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 Caribou-Targhee National Forest.
Frequently asked questions
- Can you mountain bike on Alleman?
- Yes. Mountain bikes are designated as allowed on Alleman in Caribou-Targhee National Forest, year-round, per USFS data.
- Are e-bikes allowed on Alleman?
- Class 1, Class 2, Class 3 e-bikes are designated on Alleman in the USFS data.
- How long is Alleman?
- Alleman measures about 1.4 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Alleman?
- USFS data records the tread surface of Alleman as native material.
- How difficult is Alleman?
- 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 Caribou-Targhee National Forest (USFS trail geometry isn't mapped).
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