Thunder Basin National Grassland

Forest Service626,249 acres · USDA Forest Service

Dispersed camping is generally allowed

On national forest and grassland, camping outside developed campgrounds is generally permitted unless an area is posted closed or a local order says otherwise. Stay on existing surfaces, camp away from water and trailheads, and check the forest's current orders before you go — fire restrictions change through the season.

Stay limit14 days in most forests — the exact limit is set per forest and district
In an RVDispersed sites are unimproved: no hookups, no water, no dump station, and access roads are often unsurfaced. Designated wilderness inside the unit is closed to all vehicles.
Rule36 CFR 261.58 — occupancy and use, set by forest order

Rules change with fire season and local order. Checked 2026-08-05. Confirm on the managing office’s official page

Area
979 sq mi
Managed by
Forest Service
Campgrounds
None listed
Longest rig
Not published

Where the land is, and what fits

The official Forest Service boundary with every campground we hold inside it. Tell it how long your rig is and the map keeps only what takes it — public land rarely matches the shape people picture, and neither does what you can actually get into.

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Official unit boundary · USDA Forest Service

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Thunder Basin National Grassland

The Thunder Basin National Grassland is located in northeastern Wyoming in the Powder River Basin between the Big Horn Mountains and the Black Hills. The Grassland ranges in elevation from 3,600 to 5,200 feet, and the climate is semi-arid. The Grassland provides opportunities for recreation, including hiking, sightseeing, hunting, and fishing. There are no developed campgrounds; however, camping is allowed. Land patterns are very complex because of the intermingled federal, state, and private lands.

Extract from Wikipedia, CC BY-SA. Agency description not published.

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Drive to Thunder Basin the long way

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