Salmon-Challis National Forest
The agency’s national route data maps 2,735 miles of road and 919 miles of motorized trail open to vehicles on this forest. Below is what each class of vehicle may use, and where that data runs out.
Loading routes…
Roads in gold, motorized trails in green, the forest boundary dashed, on the USGS topographic base. Zoom in for road numbers and names. Tap a vehicle type and the routes it may not use go grey. The lines are simplified for drawing; the forest's official Motor Vehicle Use Map is the legal one.
What each vehicle class can use
These are miles where the Motor Vehicle Use Map affirmatively designates the class as open. A blank value in the source data means the class is not designated on that segment. It is not the same as a closure, and no closed figure is published here because the data cannot support one.
| Vehicle class | Road miles | Trail miles | Total |
|---|---|---|---|
| Motorcycle | 2,734 | 919 | 3,654 |
| E-bike class 1 | 2,734 | 919 | 3,654 |
| E-bike class 2 | 2,734 | 919 | 3,654 |
| E-bike class 3 | 2,734 | 919 | 3,654 |
| ATV | 2,734 | 377 | 3,112 |
| Other wheeled OHV | 2,734 | 377 | 3,112 |
| Passenger vehicle | 2,735 | 119 | 2,855 |
| High-clearance vehicle | 2,735 | 119 | 2,855 |
| 4WD over 50 in | 2,734 | 119 | 2,854 |
| 2WD over 50 in | 2,734 | 119 | 2,854 |
| Tracked OHV under 50 in | 2,734 | 119 | 2,854 |
| Other OHV under 50 in | 2,734 | 119 | 2,854 |
What the national data holds for this forest
The national dataset holds route records for every ranger district on this forest.
| Ranger district | Road records | On the map | Motorized trail records | On the map |
|---|---|---|---|---|
| Lost River Ranger District | 375 | 375 | 104 | 104 |
| Challis-Yankee Fork Ranger District | 290 | 290 | 107 | 107 |
| Salmon-Cobalt Ranger District | 227 | 227 | 38 | 38 |
| North Fork Ranger District | 144 | 144 | 22 | 22 |
| Leadore Ranger District | 78 | 78 | 52 | 52 |
| Middle Fork Ranger District | 55 | 55 | 14 | 14 |
| District not named | 2 | 2 | 2 | 2 |
Counts are records in the USDA Forest Service Enterprise Data Warehouse MVUM service, roads and trails layers, harvested 21 August 2026. “On the map” means the record carries geometry a map can draw. A district with no road records is not a district without roads; it is one the agency has not published to this dataset.
This map is being rewritten, and comment is open
On 24 August 2026 the Forest Service proposed rewriting 36 CFR parts 212 and 261, the rules that produced this map. Today a route on the Salmon-Challis National Forest is closed to vehicles unless the forest studied it and put it on the map. The proposal flips that: open unless someone documents a reason to close it. It also removes the national rules that tell a forest supervisor to weigh damage to soil, water and wildlife, and conflict with other visitors, before a route goes in.
Public comment ran through docket FS-2026-0100 on regulations.gov until 23 September 2026. Comments that name a forest and say what the writer knows about it are the ones the agency has to answer. You know this one.
Three minutes, in your own words. Your letter carries this forest's own figures, because a comment that names a place is one the agency has to answer.
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When the rule itself lands, we will tell you
One email when the Forest Service files the proposed rule, and when a comment window opens on the public lands you use. Nothing else.