The Russian River watershed covers nearly 1,500 square miles of land in Sonoma and Mendocino counties. Zoom in on the interactive map below and blue lines will show all streams in the basin known to contain salmon and/or steelhead habitat. You can search by stream name, or select a blue line to see the name. Notice that streams above Lake Sonoma and Lake Mendocino are not shown because there is no anadromous fish passage.