1998 Map of Tortuga

About this map

Chocolate Mountain Aerial Gunnery Range dominates the rugged landscape of Imperial County, marked by a sprawling Military Reservation Boundary that encloses significant portions of the Chocolate Mountains. In the lower desert elevations, the transition from the Algodones Dunes to the East Mesa is defined by vital water infrastructure, including the Coachella Canal and East Highline Canal. These artificial waterways parallel the natural drainage of Mammoth Wash, illustrating the engineering required to sustain the arid region. Small settlement points like Tortuga and Amos anchor the transportation corridors, which include the Niland-Glamis Road and an Old Railroad Grade. The map captures a moment when traditional desert landmarks like Barth Well and Salvation Pass remained critical points of reference within a landscape increasingly shaped by modern military and irrigation projects.