Big Basin USGS Mount Saint Helena Quad, California, Topographic Map

Big Basin is a Basin in the state of California (county of Sonoma), located at latitude - longitude coordinates (also known as lat-long or GPS coordinates) of N 38.71213 and W -122.71471. Big Basin is shown in the center of the topographic (topo) map, which is sourced from the United States Geographical Survey map USGS Mount Saint Helena quad. The nearest major town is Loch Lomond, CA.