Opened 1986, park features fishing and boating on 26,000-acre Choke Canyon Reservoir, an impoundment of the Frio River. Camping, restrooms and picnicking. The townsite of Old Calliham within the park provides campsites, screened shelters, seven-lane boat ramp, rock jetty, fishing pier, swimming area, fish-cleaning stations, trails and concession facilities. Fee.