
Joshua Tree National Park encompasses much of this desert terrain, where the low-lying Pinto Basin meets the dramatic rises of the Coxcomb Mountains and Eagle Mountains. This 2021 survey illustrates the modern intersection of natural preservation and critical infrastructure, most notably the path of the Colorado River Aqueduct as it traverses the southern portion of the quadrangle. The hydrology is dominated by the seasonal Pinto Wash, which drains through the heart of the park toward the Mojave Desert and Chuckwalla Valley. In the southwest corner, the landscape grows increasingly complex near Bold Eagle Canyon. The presence of Phone Line Rd along the southern margin represents one of the few human-engineered routes through this otherwise protected wilderness area, highlighting the sparse, managed accessibility typical of this part of Riverside County.
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This is the sole edition of this map. No revisions or reprints were ever made.
1942 · Amboy
USGS Topo · 1:250,000
1943 · Amboy
USGS Topo · 1:250,000
1943 · Cadiz Valley
USGS Topo · 1:62,500
1943 · Coxcomb Mountains
USGS Topo · 1:62,500
1944 · Eagle Tank
USGS Topo · 1:62,500
1944 · Coxcomb Mountains
USGS Topo · 1:62,500
1954 · Salton Sea
USGS Topo · 1:250,000
1954 · Needles
USGS Topo · 1:250,000
1955 · Salton Sea
USGS Topo · 1:250,000
1956 · Needles
USGS Topo · 1:250,000