Barron Creek is a 5.8-mile-long (9.3 km) northward-flowing stream originating in the lower foothills of the Santa Cruz Mountains in Los Altos Hills in Santa Clara County, California, United States. It courses northerly through the cities of Los Altos Hills and Palo Alto, before joining Adobe Creek just south of U.S. Highway 101. As Adobe Creek, its waters continue northwards to southwest San Francisco Bay after crossing under Highway 101 and traversing the Palo Alto Flood Basin.