1967 Map of Crump Lake

Evidence of early passage and land use is visible at Stone Bridge, where travelers crossed the valley floor. The desert terrain is marked by intermittent water sources and geothermal features like Hot Springs at the foot of the mountains. To the east, the map details the transition from the lakebeds to the high desert plateaus of Big Flat, cut by deep drainages such as Ruffle Canyon and Fisher Canyon. Several jeep and pack trails indicate the remote nature of the region during the mid-20th century.