Keywords: Petaluma River Watershed 2007 Steelhead Survey.jpg en Map of Petaluma River Watershed with locations of steelhead trout in 2007 biosurvey Government Biosurvey U S Fish and Wildlife 2007 Maps of rivers in California Fish of California Oncorhynchus mykiss distribution maps California Geography of Sonoma County California PD-USGov Petaluma River |