"Limestone-Whiting Wilderness Park en compasses 4,000 acres on
the north end of Lake Forest and Foothill Ranch in the foothills of the Santa Ana Mountains. The park, an old cattle ranch, contains riparian and oak woodlands, rolling grasslands, scrub-covered slopes, and dramatic rock formations. Four seasonal streams—Borrego, Serrano, Glass, and Aliso Creek—wind through the parkland canyons. Twenty-six miles of graded roads and foot trails traverse throughout the park for hikers, bikers, and equestrians.
Borrego Canyon and Serrano Canyon are the two largest drainages in the parkland. This hike leads up Borrego Canyon to Vista Lookout, a 1,500-foot knoll on the northwest corner of the park. From the overlook are views of Red Rock Canyon, Limestone Canyon, and the Santa Ana and San Gabriel mountains. Viewing scopes atop the knoll highlight Old Saddleback, Luke Mesa, Caspers Wilderness Park, and Catalina Island. The Santiago Fire burned 90% of the area in 2007, but the landscape has been steadily recovering."