The Poison Spring State Park is a state park and historic site in Camden, Arkansas. It is a National Historic Landmark and a part of the Camden Expedition Sites National Historic Landmark.

The Poison Spring State Park commemorates the Battle of Poison Springs. The term ?poison springs? came from the story where the Confederate soldiers poisoned the nearby springwater. The event took place in April 1864 and contributed further to the failure of the Camden Expedition. It also gained notoriety on the part of the Confederate forces as they slaughtered African-American Union soldiers for they don?t take African-American prisoners.

The Poison Spring State Park includes a trail, a picnic area, and some outdoor exhibits about the battlefield. Some portions of the park are also a part of the National Park Service?s Underground Railroad Network to Freedom.