From 73 Fwy south MacArthur Blvd. south: approx. 3 miles to San Joaquin Hills Rd.; right to Big Canyon Dr. East gate to entrance. From 73 Fwy north: Bonita Canyon Rd.; west approx 2 miles to MacArthur Blvd.; south to San Joaquin Hills Rd.; turn right to Big Canyon Dr. to entrance.