101 Hikes in Southern California: Exploring Mountains, Seashore and Desert
The 18,000-acre Agua Tibia Wilderness lies northwest of Palomar Mountain, straddling the San Diego and Riverside county line in Cleveland National Forest. Agua Tibia Mountain, one of the three distinct mountain blocks of the Palomar range, is the centerpiece of the wilderness that bears its name. Sparse groves of Coulter pine, bigcone Douglas-fir, incense-cedar, live oak, and black oak cover the highest elevations, while the lower slopes are scrub-covered and fluted by many steep canyons holding intermittent streams. The wilderness was named after one of these streams, Agua Tibia (“tepid water”) Creek.