At 3,111 feet, Sandstone Peak is the tallest point in the Santa Monica Mountains. The Santa Monica Mountains is a coastal mountain range in Southern California, paralleling the Pacific Ocean. It is part of the Transverse Ranges. Because of its proximity to densely populated regions, it is one of the most visited natural areas in California. Santa Monica Mountains National Recreation Area is located in this mountain range.
Check out this outside link for more about this location: https://www.theoutbound.com/los-angeles/hiking/hike-sandstone-peak