3S04 Main Divide to Santiago Peak

The 3S04 Main Divide to Santiago Peak trail is a 4.8-mile route through the Cleveland National Forest, following the ridgeline of the Santa Ana Mountains. It rises from 4,534 feet to 5,681 feet, offering expansive views of the Temescal Valley, the Los Angeles Basin, and Catalina Island. Most of the trail consists of dirt and loose rock, accessible to high-clearance four-wheel-drive vehicles. The final spur to Santiago Peak near the radio towers increases in difficulty, requiring a high-clearance 4x4 to navigate deep ruts and large rocks. The route is subject to seasonal closures during and after heavy rain to prevent trail damage.