Fort Parker State Park, State park in Limestone County, Texas

Fort Parker State Park is a 1,458.8-acre state park in Limestone County, Texas, near Mexia. It contains Lake Fort Parker, formed by a 423-foot dam of limestone, concrete, and soil across the Navasota River. The park has a grassy lawn with boulders and a low metal signpost near a paved area, with trees and water in the background.

Mexia and three local landowners donated the land in 1935, and Civilian Conservation Corps Company 3807(C) worked from 1935 to 1942, building roads, the concession building and a 423-foot dam of limestone, concrete and soil across the Navasota River that formed Lake Fort Parker. The park is named after Fort Parker, site of the 1836 Fort Parker massacre, not a settlement inside the park. Former Governor Pat Neff dedicated it and it opened in May 1941.

The Old Springfield Cemetery within the park marks the location of Springfield, a former county seat that declined after the Civil War.

Fort Parker State Park has four hike-and-bike trails: Springfield (1.8-mile loop), Navasota River (1.9 miles one way), River Loop (0.9-mile loop) and Baines Creek (2.5 miles one way). A separate 0.5-mile Bur Oak loop is hiking only and comes with an interpretive guide pamphlet. The Limestone Bluffs Paddling Trail covers 10.8 miles as a loop, and canoes, kayaks and paddleboats can be rented. The nature center opens every weekend.

The park's 423-foot dam across the Navasota River was built by Civilian Conservation Corps Company 3807(C) using limestone, concrete and soil, forming Lake Fort Parker. The lake holds an active great blue heron rookery, and a nesting pair of bald eagles has been recorded there.