Visitors to this archaeological site will see Florida's tallest Native American ceremonial mound-46 feet-built between 1100 and 1800 years ago. The people who built the mound are believed to have been members of the Weedon Island Culture, a group of Native Americans who lived in North Florida between 200 and 800 A.D. The park offers picnicking, birding, and hiking. A nature trail winds around the perimeter of the ceremonial mound. The picnic area and platform viewing area for the mound are wheelchair-accessible. Located 15 miles east of Tallahassee, off U.S. 90 on 4500 Sunray Road South.

Letchworth Mounds is a significant cultural resource. The site is part of a larger mound complex that extends beyond the park boundaries. The cultural resources of Letchworth Mounds consist of multiple mounds, including a small burial mound on Sunray Road recorded in 1972, and the larger mound complex recorded 5 years later.

Prior to becoming a state park most of the land was agricultural, including livestock production. Acquisition by the state began in 1992 under the P-2000/CARL Program to protect and preserve the mound and related archaeological deposits. On June 30, 1992, the Board of Trustees of the Internal Improvement Trust Fund obtained title to Letchworth Mounds and on October 21, 1996, conveyed management to the Department of Environmental Protection, Division of Recreation and Parks. The park opened to the public in 1998.