The San Andreas Fault cuts a diagonal path through this landscape where the San Gabriel Mountains and San Bernardino Mountains converge. This 2015 survey illustrates the intense urban expansion in the southern half of the quadrangle, where the residential grids of Fontana, Rancho Cucamonga, and Rialto meet at the base of the mountains. A significant portion of the land is dedicated to the San Bernardino National Forest, protecting the complex topography of Cajon Canyon and Sycamore Canyon. Transportation is a dominant theme, with the high-traffic corridors of Cajon Blvd and the San Bernardino rail lines navigating the narrow pass between mountain ranges. Local history is reflected in smaller settlements like Keenbrook and Devore, while the Rialto Municipal Airport/Miro Field stands as a prominent landmark on the valley floor.
162 named features on this map. Tap any name to fly to it.
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This is the sole edition of this map. No revisions or reprints were ever made.
1896 · San Bernardino
USGS Topo · 1:62,500
1897 · Cucamonga
USGS Topo · 1:62,500
1898 · San Bernardino
USGS Topo · 1:62,500
1900 · Cucamonga
USGS Topo · 1:62,500
1901 · Southern California Sheet No. 1
USGS Topo · 1:250,000
1901 · San Bernardino
USGS Topo · 1:62,500
1902 · Hesperia
USGS Topo · 1:62,500
1903 · Cucamonga
USGS Topo · 1:62,500
1903 · San Antonio
USGS Topo · 1:62,500
1904 · Southern California Sheet No. 1
USGS Topo · 1:250,000