In 1854, John Anderson Penn settled in the rugged cedar-covered hills of southwest Dallas County, an area known as the Cedar Mountains. Today, remnants of the original Penn Farm survive intact in the confines of Cedar Hill State Park. This urban nature preserve is located on 7500-acre Joe Pool Reservoir.
Facilities include restrooms, picnic sites, campsites (both primitive and developed), hiking trails, mountain bike trails, boat ramps, and other recreational facilities.