Calliham Unit Boat Ramp is a six-lane improved ramp with lighting located within Choke Canyon State Park, seven miles west of Three Rivers on Texas Highway 72.

The facility offers fish cleaning stations, handicap access, ample parking, and is open year-round (6 a. m. to 10 p. m. daily), though a park entry fee is required. Additional amenities include picnic areas, camping facilities, and a bait shop nearby.