The eastern foothills of the Diablo Range meet the flat expanses of the Central Valley in this detailed survey of the San Joaquin and Alameda county line. The settlement of Midway serves as a central point where the complex water infrastructure of the region—including the Governor Edmund G Brown California Aqueduct and the Delta-Mendota Canal—navigates the transition from the hills to the valley floor. To the north, the growing community of Mountain House and the outskirts of Tracy illustrate the modern residential expansion into what was traditionally ranching and transit land near Altamont Pass Rd. In the southern half of the map, the terrain becomes increasingly complex, characterized by deep cuts like Elk Ravine and Mitchell Ravine that drain toward Corral Hollow Cr. This area preserves the rugged character of the historical Corral Hollow corridor, once a vital passage through the coast ranges.
43 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.
1907 · Tesla
USGS Topo · 1:62,500
1911 · Byron Hot Springs
USGS Topo · 1:31,680
1914 · Bethany
USGS Topo · 1:31,680
1914 · Union Island
USGS Topo · 1:31,680
1916 · Byron Hot Springs
USGS Topo · 1:31,680
1916 · Byron
USGS Topo · 1:62,500
1916 · Tracy
USGS Topo · 1:31,680
1916 · Midway
USGS Topo · 1:31,680
1922 · Carbona
USGS Topo · 1:62,500
1940 · Byron
USGS Topo · 1:62,500