360-acre park in southwest Dallas County near Joe Pool Lake offers seven miles of hiking trails, picnic areas, visitor center and gift shop. Habitat for black-capped vireo and other birds, variety of Texas mammals, reptiles, fish, and insects. Mary Alice Perkins Bland Butterfly Garden attracts a variety of native butterflies with wild flowers and reflecting pools. Take I-20 to Mountain Creek Pkwy exit; south 2.5 miles to 7171 Mountain Creek Pkwy.