Day hike to Three Sisters falls
It’s about a 3 hour hike down and back, not including the couple hours for lunch and swimming.
GPS to trailhead from I-8:
Directions: (Taken from SD Reader see link above)
To get to the trailhead from San Diego, exit Interstate 8 at Highway 79 (Descanso exit) and drive north. After 1.3 miles turn left on Riverside Drive. Continue 0.6 mile to the main crossroads (post office, etc.) of the hamlet of Descanso. From there take Oak Grove Drive 1.6 miles to the intersection of Boulder Creek Road on the right. Follow Boulder Creek Road north for 13.0 miles (first half paved, then dirt) to a hairpin turn where unpaved Cedar Creek Road joins from the west. Park there, taking care not to block traffic, and post a National Forest Adventure Pass on your car (the parking area and falls lie in Cleveland National Forest territory).