1940 Map of Dome Rock Mts

About this map

The Colorado River Indian Reservation dominates the northern reaches of this Yuma County landscape, where the Colorado River serves as a critical boundary line. The central topography is defined by the Dome Rock Mountains, a network of peaks and high passes that supported a widespread mining economy during the early 20th century. Evidence of this extractive history is scattered across the range, from the Goodman Mine in the north to the Cinnabar Mine and Copper Chief Mine further south.