In the 1930's the U. S. Forest Service, using C.C.C. (Civilian Conservation Corps) labor, improved an old chumash trail that followed Agua Blanca Creek up the canyon. It was a popular trail because of the good hunting and fishing in the canyon. The trail begins at Festers Camp at the junction of the canyon with Piru Creek. Following up the canyon it comes to the Devils Gateway which is a narrow cliff cut through a conglomerate rock ridge. There is a trail over the ridge but it is rocky and steep. It is best to go up through the pools in the bottom of Devils Gate. Just beyond the narrows is a junction with the Pot Hole Trail that crosses the creek and climbs to reach the old Whitaker cabin and Pot Hole. Just beyond the trail junction is Log Cabin Camp. The cabin is long gone but a trail camp is located at the site. Continuing on up the Agua Blanca Creek the trail will pass a historic campsite called Hollister Camp. It was named for an early day U. S. Forest Ranger who had a camp beside the creek. Next comes Cove Camp on the left hand side of the creek.
A short distance beyond this camp is Big Narrows. Here the creek cuts through a ridge of cobblestone to form a "U" like narrows. The walls of the cliff are very tall and numerous pools form as the creek descends through the narrows. There is a trail that climbs over the ridge on the west side of the narrows but it is more enjoyable to go through the narrow part of the canyon.
Further up the creek the trail reaches Ant Camp where a trail comes in from Dough Flats and Fillmore. The Agua Blanca trail used to continue up the creek passing two old hunting camps to finally climb to the top of Cobblestone Mountain but the trail beyond Ant Camp has not received any maintenance and is now a wall of dense brush and washouts from floods.
From Highway 126 turn north on Piru Canyon Road. Drive 6 miles to Lake Piru Gatehouse pay the entrance fee and drive 2.3 miles to the launch ramp where parking is available.
From the launch ramp hike 4.2 miles north on Piru Canyon Road to the old Blue Point Campground which is closed. Walk through the gate on left before the stream crossing. Follow the dirt road up Piru Creek for 1.2 miles and at the junction turn left (west) to the Agua Blanca Trail where the Sespe Wilderness begins.
Log Cabin Camp above Devil's Gateway is 4.3 miles from the trailhead. The Pothole Trail (18W04) intersects the trail near Log Cabin Camp. Continuing on the Agua Blanca Trail is barely passable for hiking and is definitely not recommended for horseback riders. Poison oak along the trail is unavoidable. The Agua Blanca Trail is one of the most scenic trails on the Ojai Ranger District.