USFS National Forest System Trails · Caribou-Targhee National Forest · Idaho · Updated June 2026
Boulder Creek-Diamond Pk (USFS trail 5115) is a 5.9 mi trail in Caribou-Targhee National Forest, Idaho. Mountain bikes are designated as allowed year-round, with no Class 1 e-bike designation on record.
Can I bike Boulder Creek-Diamond Pk?
| Use | Status | Season on record |
|---|---|---|
| Mountain bike | Allowed | year-round |
| Class 1 e-bike (pedal-assist, 20 mph) | — | |
| Class 2 e-bike (throttle, 20 mph) | — | |
| Class 3 e-bike (pedal-assist, 28 mph) | — |
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
In Caribou-Targhee National Forest, Idaho, Boulder Creek-Diamond Pk (USFS trail 5115) covers 5.9 mi of National Forest System trail. The figures here are pulled from the official US Forest Service trail data for Caribou-Targhee 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. Its grade-based difficulty is Intermediate (grade band +8-10%) — a moderate steepness profile derived from USFS slope data, not a technical mountain-bike rating. 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 2 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 Boulder Creek-Diamond Pk?
- Yes. Mountain bikes are designated as allowed on Boulder Creek-Diamond Pk in Caribou-Targhee National Forest, year-round, per USFS data.
- Are e-bikes allowed on Boulder Creek-Diamond Pk?
- No e-bike class (1, 2 or 3) is designated on Boulder Creek-Diamond Pk in the USFS data.
- How long is Boulder Creek-Diamond Pk?
- Boulder Creek-Diamond Pk measures about 5.9 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Boulder Creek-Diamond Pk?
- USFS data records the tread surface of Boulder Creek-Diamond Pk as native material.
- How difficult is Boulder Creek-Diamond Pk?
- Its grade-based difficulty is Intermediate (grade band +8-10%), 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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