Southern California Desert Parks
Joshua Tree National Park
East Mojave National Scenic Preserve
The park areas are shown in green. Anza-Borrego Desert State Park is to the south, west of the Salton Sea, marked with a red flag. Joshua Tree National Park is in the center, with the blue tack. East Mojave National Scenic Preserve, is to the north, with a red flag.
This map shows Anza-Borrego Desert State Park in relation to San Diego, and extending nearly to the border with Mexico (highlighted in yellow). The other areas in green are Indian Reservations.
Aerial image of Anza-Borrego from http://www.desertusa.com/