Byron Hot Springs serves as a notable landmark in this corner of Contra Costa County, where the transition from the Central Valley to the Diablo Range foothills is defined by sophisticated water management and rural ranching. The massive Los Vaqueros Reservoir dominates the western landscape, capturing runoff from Kellogg Cr and Marsh Cr, while the Bethany Reservoir and the S Bay Aqueduct to the south underscore the region's critical role in California's water infrastructure.
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1896 · Mt. Diablo
USGS Topo · 1:62,500
1898 · Mt. Diablo
USGS Topo · 1:62,500
1906 · Pleasanton
USGS Topo · 1:62,500
1907 · Tesla
USGS Topo · 1:62,500
1911 · Byron Hot Springs
USGS Topo · 1:31,680
1913 · Woodward Island
USGS Topo · 1:31,680
1914 · Brentwood
USGS Topo · 1:31,680
1914 · Bethany
USGS Topo · 1:31,680
1916 · Lone Tree Valley
USGS Topo · 1:31,680
1916 · Byron Hot Springs
USGS Topo · 1:31,680