2021 Map of Imperial Reservoir

About this map

Martinez Lake and the Colorado River corridor define this desert borderland where the water of the river is diverted and managed for agriculture and recreation. The presence of the Gila Gravity Main Canal and the Senator Wash Reservoir underscores the hydraulic engineering necessary for habitation in the arid Southwest. Small lakeside settlements like Fishers Landing provide access to the river's backwaters, while the rugged Chocolate Mountains rise to the west, separated by the Explorers Pass. Military operations are represented at the Laguna Army Airfield (Yuma Proving Ground) near the southern end of the sheet. The landscape is a network of named desert tracks, including Red Cloud Mine Rd and Air Strip Rd, which navigate the various washes like Los Angeles Wash that feed into the river system along the Arizona and California boundary.