USFS National Forest System Trails · Hoosier National Forest · Indiana · Updated June 2026
Brown Co. "D" (USFS trail 409.10) is a 2.1 mi trail in Hoosier National Forest, Indiana. Mountain bikes are designated as allowed year-round, with no Class 1 e-bike designation on record.
Can I bike Brown Co. "D"?
| 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 Hoosier National Forest, 100% of rideable trail miles are open to mountain bikes — a Bike Access Grade of B.
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About this trail
Brown Co. "D" (USFS trail 409.10) is a 2.1 mi trail in Hoosier National Forest, Indiana. 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. The tread is mapped as imported loose 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. The agency lists no Class 1, 2 or 3 e-bike designation here; absent a local order to the contrary, that means e-bikes are not an allowed use on this trail. 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 Brown Co. "D"?
- Yes. Mountain bikes are designated as allowed on Brown Co. "D" in Hoosier National Forest, year-round, per USFS data.
- Are e-bikes allowed on Brown Co. "D"?
- No e-bike class (1, 2 or 3) is designated on Brown Co. "D" in the USFS data.
- How long is Brown Co. "D"?
- Brown Co. "D" measures about 2.1 mi in total, summed across its mapped National Forest System segments.
- What is the surface of Brown Co. "D"?
- USFS data records the tread surface of Brown Co. "D" as imported loose material.
- How difficult is Brown Co. "D"?
- 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 Hoosier National Forest (USFS trail geometry isn't mapped).
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