Louisiana Purchase Natural Area
Louisiana Purchase Natural Area,  Monroe, Lee and Phillips Counties,  preserves the initial point from which land surveys of the Louisiana Purchase Territory began in 1815. The swamp surrounding the marker is called a "headwater swamp." Headwater swamps maintain more constant water levels than riparian swamps due to reduced drainage of the area. The swamp is about 6 miles long and less than a mile wide. Swamps such as these have all but vanished from the Mississippi Alluvial Plain. The headwater swamp at Louisiana Purchase is the largest remaining in the Lower Mississippi Alluvial Valley. The natural area is a cooperative project with Arkansas State Parks and features an interpretive boardwalk into the heart of the swamp, providing a view of the stone survey monument. This trail is handicapped accessible.

Hunting is prohibited on this natural area.


From Interstate 40 at Brinkley, take U.S. Highway 49 and go 21 miles south to State Highway 362. Travel 2 miles east.

Contact Louisiana Purchase Natural Area



Service Area

Statewide service provider in:
  • Arkansas

To request additions or corrections to this entry email the Administrator