Louisiana Purchase Historic State Park

Louisiana Purchase Historic State Park is a state park in Monroe County, Arkansas, featuring a long boardwalk over swampy terrain that leads to a granite monument. This monument marks the original survey reference point from which all subsequent land measurements in the region were based.

The park marks where the territorial survey system began following the 1803 Louisiana Purchase, which roughly doubled the size of the United States. A granite monument was placed there in 1926 to commemorate this important reference point for land measurement.

The L'Anguille Chapter of the National Society of the Daughters of the American Revolution dedicated a monument at this location in 1926.

The park is open daily and is located southeast of Brinkley, reachable via Arkansas Highway 362. The boardwalk is easy to walk and features signage that explains the survey's historical context.

The swamp ecosystem hosts native trees including swamp tupelo and bald cypress where prothonotary warblers and kingfishers can often be spotted. This wetland setting gives visitors a chance to observe local wildlife in an undisturbed natural habitat.

Location: Monroe County

Inception: 1961

Website: https://arkansasstateparks.com/louisianapurchase

GPS coordinates: 34.64569,-91.05397

Latest update: December 6, 2025 17:43