2021 Map of Iris Pass

About this map

The Chocolate Mountains dominate this high-desert landscape in Southern California, where the rugged topography is defined by the namesake Iris Pass. This 2021 survey focuses on a remote section of the Colorado Desert where natural drainage patterns are dictated by the long, winding course of Iris Wash. The map documents a sparsely developed area where the physical geography remains the primary feature, underscored by the jurisdictional boundary separating Riverside and Imperial counties. Significant elevation changes are captured through the network of canyons and ridges that characteristically define this portion of the mountain range, providing a precise look at the arid terrain as it existed in the early twenty-first century.