Anza Borrego Desert State Park is the largest desert park in the United States, drawing approximately 650,000 visitors per year. Combining detailed narrative with GPS-based trail maps, Day and Overnight Hikes: Anza-Borrego Desert State Park breaks down the best of the best hikes, both day and overnight. Whether it's the best view over Culp Valley, a walk through Hellhole Canyon, or a flat walk through hills and dales near the Salton Sea, Day and Overnight Hikes is the definitive go-to guide to enjoy the largest desert park in the United States, just an hour's drive from San Diego.