2018 Map of Augustine Pass

About this map

The Bradshaw Trl cuts across this arid landscape, following a historic gold-rush era corridor through the desert. This 2018 survey documents the remote borderlands where Riverside Co and Imperial Co meet, a region defined by the stark gap between the Chuckwalla Mountains to the north and the Chocolate Mountains to the south. The terrain is structured by critical mountain crossings, notably Augustine Pass and Surveyors Pass, which provide passage through these steep ranges. While modern vehicle access is indicated by Augustine Rd and Niland Rannels Rd, the hydrology remains dominated by ephemeral features like the Arroyo Seco, reflecting the harsh environment of the Colorado Desert. The map serves as a detailed record of high-desert topography, showing the network of trails and unimproved roads used by modern explorers tracing these historic routes.