Plum Bayou Mounds Archeological State Park

The site preserves what archaeologists call the Plum Bayou culture's primary ceremonial center, occupied roughly 650 to 1050 CE (Encyclopedia of Arkansas; major excavations by the Arkansas Archeological Survey ran from 1977 to 1990). Of eighteen mounds that once stood around two rectangular plazas, three remain: Mound A at about 48 to 49 feet, the tallest surviving American Indian mound in Arkansas; Mound B at about 38 feet; and Mound C, the only one known to have been a burial mound. A ditch and earthen embankment runs more than a mile around three sides of the complex, with a lake forming the fourth side. The Encyclopedia of Arkansas notes this enclosure style appeared at important Mississippi Valley religious centers centuries earlier, evidence of long continuity in the region. Mounds A and B are flat-topped platform mounds that likely carried structures associated with religious leadership, and deposits of butchered animal bone point to community feasting.

The name on the road signs tells its own story. Nineteenth-century writers assumed the mounds were built by the Toltecs of central Mexico, a common misattribution of the era, and the state park carried that wrong name for decades before a 2022 renaming honored the Plum Bayou culture that actually built it (Arkansas Archeological Survey). The site is a National Historic Landmark and one of the large archaeological sites of the Lower Mississippi River Valley (Arkansas State Parks). Ongoing excavation is part of the visit: the park partners with the Arkansas Archeological Survey, whose station archaeologists work on site, and visitors can sometimes observe research in progress. The mounds remain ancestral ground for Native nations of the region, and the park frames them as ceremonial architecture rather than scenery.

Visiting

The park is operated by Arkansas State Parks. The visitor center is open Wednesday through Saturday from 8 a.m. to 5 p.m. and Sunday from 1 to 5 p.m.; it closes Mondays and Tuesdays and major holidays (New Year's Day, Thanksgiving, Christmas Eve and Christmas Day), and opens on Memorial Day, Labor Day and July 4. There is no entrance fee. Guided tours are available by advance request, and the park calendar lists ceremonial-site walking tours and seasonal events, including a Winter Solstice Celebration. Contact: 501-961-9442, plumbayou@arkansas.com.

Photo: [Herb Roe, CC BY-SA 3.0, via Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Chromesun_toltec_mounds_photo01.jpg)