San Bernardino Valley, Valley region in Southern California, United States.
San Bernardino Valley is a geographic area in Southern California bounded by several mountain ranges including the San Gabriel, San Bernardino, San Jacinto, and Santa Ana mountains. The terrain descends from mountain ridges to low plains, creating a distinct basin with varied topography.
Spanish missionaries established an outpost in 1810 to extend the reach of Mission San Gabriel Arcángel into the region. This settlement focused on cattle ranching and managing interactions with local indigenous groups.
Native peoples including the Serrano, Cahuilla, and Tongva called this area home for generations before European contact. Trade routes connected distant communities and shaped how people moved through the land.
Two major airports serve the area: Ontario International and San Bernardino International, providing connections for visitors. Interstate 10 and Interstate 15 pass through, connecting the valley to broader regional networks.
The valley sits above a significant groundwater system with multiple aquifers serving the region's water needs. The Chino, Rialto-Colton, and Riverside-Arlington sub-basins supply much of the water used in the area below the surface.
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