The park has sixty miles of hiking, mountain bike and equestrian trails, a rock climbing area, and the Kumeyaay Lake Campground with 46 camp sites adjacent to a small lake. There is also the Mission Trails Regional Park Visitor and Interpretive Center. It includes a number of exhibits, a library, and a 93-seat theater that includes a Blu-ray projection system with a large screen. The Visitor Center also includes an art gallery. The most popular trail of the park is the Cowles Mountain trail (pronounced Colz), which takes hundreds of people per day to the summit for a 360-degree panorama of San Diego County. Another popular stop is the Old Mission Dam, which was built to supply irrigation water to farm land that supplied food for the Mission San Diego de Alcala, the first of the chain of missions established by Junípero Serra in California. Another popular destination within the park is Lake Murray, a reservoir supplying water to San Diego neighborhoods. It has a surface area of approximately 168 acres. The lake is periodically stocked with trout and bass.