California's Colorado Desert.

California's Colorado Desert is a part of the larger Sonoran Desert, which extends across southwest North America. The Colorado Desert region encompasses approximately 7 million acres (2,800,000 ha), reaching from Northwest Mexico border regions in the south to the higher-elevation Mojave Desert in the north and from the Colorado River in the east to the Laguna Mountains of the Peninsular Ranges in the west. The area includes the heavily irrigated Coachella and Imperial Valleys. The Colorado Desert is home to many unique flora and fauna, many of which can be found nowhere else on the planet.