Start at Quail Valley and hike down Middle Ranch Rd. to Camp Cactus Rd. Pass through a locked gate, after 0.5 miles turn left onto Hack Tower Ridge Rd. At the end of the road turn left and descend to the Islands largest body of water, Middle Ranch Reservoir. Follow the road over the dam and turn left at the stable, at the main road head back down the canyon to the trailhead.