The Anza-Borrego and Western Colorado Desert Region is a vast land spanning much of San Diego County and parts of Riverside and Imperial Counties. This intriguing landscape harbors a rich variety of desert plants and animals, all within two to three hours' travel time from major Southern California cities. Now in its expanded 5th edition, The Anza-Borrego Desert Region offers complete coverage of the over 1 million acres of desert lands, including Anza-Borrego Desert State Park, Ocotillo Wells State Vehicular Recreation Area (OWSVRA), parts of the Santa Rosa and San Jacinto Mountains National Monument, and adjacent BLM recreational and wilderness lands. This is a guide for hikers, campers, 4WD explorers, history buffs, mountain bikers, equestrians and casual visitors. It includes: Comprehensive road and trail logs with UTM coordinates Higway mileage markers, natural history detail, and historical anecdotes Newly revised and expanded backpocket map, now in full color Expanded Desert Directory - agencies, accomodations, and facilities GPS waypoints