Southeast Missouri / Lead Belt / Mississippi Corridor
The Potosi ranger district is a federal land desk inside the county
The Mark Twain National Forest keeps a Potosi/Fredericktown Ranger District office in Potosi, which helps explain Washington County's federal-land layer.
Washington County has a federal-land office layer as well as county and state park layers. The Forest Service lists the Potosi/Fredericktown Ranger District office at 10019 W. State Hwy. 8 in Potosi, with office phone and email contact information.
The recreation page for the Potosi and Fredericktown area describes the Potosi Ranger District as a large district with developed and undeveloped camping and picnicking sites, plus karst features, caves, springs, streams, and trail areas.
For a resident or visitor, the important local cue is the office routing. Questions about Mark Twain National Forest land should start with the Forest Service district, not the Washington County courthouse or a state park desk.
Where to see it
- Potosi/Fredericktown Ranger District
Use the Forest Service district page for federal-land office routing and contacts.
- Potosi and Fredericktown recreation area
Use the Forest Service recreation page for camping, trails, caves, streams, and alerts.
References
More from Washington County: browse every local note for the county.
Last checked against the sources above: July 16, 2026.