USFS National Forest System Trails · Boise National Forest · Idaho · Updated June 2026
Tranquil Basin (USFS trail 027005) is a 0.6 mi trail in Boise National Forest, Idaho. Mountain bikes are designated as allowed year-round, with Class 1 e-bikes also designated.
Can I bike Tranquil Basin?
| 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 Boise National Forest, 99% of rideable trail miles are open to mountain bikes — a Bike Access Grade of A.
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About this trail
Tranquil Basin (USFS trail 027005) runs 0.6 mi through Boise National Forest in Idaho. The figures here are pulled from the official US Forest Service trail data for Boise National Forest, covering the trail's mileage, tread, grade band, and the bike and e-bike uses the agency lists as designated. Underfoot, the trail is recorded 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. The record additionally permits Class 1, Class 2, Class 3 e-bike use; recall that Class 1 is pedal-assist, while Class 2 adds a throttle and Class 3 a higher cutoff 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 Tranquil Basin?
- Yes. Mountain bikes are designated as allowed on Tranquil Basin in Boise National Forest, year-round, per USFS data.
- Are e-bikes allowed on Tranquil Basin?
- Class 1, Class 2, Class 3 e-bikes are designated on Tranquil Basin in the USFS data.
- How long is Tranquil Basin?
- Tranquil Basin measures about 0.6 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Tranquil Basin?
- USFS data records the tread surface of Tranquil Basin 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 Boise National Forest (USFS trail geometry isn't mapped).
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