(GMT)27 MAY 2017 DEPL_34:  Anza Borrego Desert State Park, California’s largest state park. Located about two hours from the city, this desert park is a wonderful day trip. You can enjoy five hundred miles of dirt roads, 12 wilderness areas and many miles of hiking trail. The Park is located on the eastern side of San Diego County, with portions extending east into Imperial County and north into Riverside County. Travllers can approach from the east via Highways S22, S2, or 78. Visitors from San Diego via Highways 79 and 78 have the added pleasure of driving through the mountainous Cuyamaca Rancho State Park--quite a different experience from Anza-Borrego. The highways from the east climb to 2,400 feet or so and then descend about 2,000 feet to the valley. Where the highway breaks out of the high-country vegetation, it reveals the great bowl of the Anza-Borrego desert. The valley spreads below, and there are mountains all around. The highest are to the north--the Santa Rosa Mountains. The mountains are a wilderness, with no paved roads in or out or through. They have the only all-year-flowing watercourse in the park. They are the home of the peninsular bighorn sheep, often called desert bighorn. Few park visitors ever see them; the sheep are justly wary.