Napa Sonoma Marsh

Napa Sonoma Marsh
Aerial view of the southern end of the Napa River in the Napa Sonoma Marsh
Napa Sonoma Marsh is located in California
Napa Sonoma Marsh
Napa Sonoma Marsh
Location in California
LocationSan Francisco Bay Area, California, USA
Coordinates38°10′07″N 122°20′22″W / 38.16871°N 122.33946°W / 38.16871; -122.33946
TypeMarsh
Part ofSan Pablo Bay, San Francisco Bay
Primary inflowsSonoma Creek
Napa River
Surface area48,000 acres (190 km2)
Sections/sub-basinsSan Pablo Bay National Wildlife Refuge
WebsiteOfficial website

The Napa Sonoma Marsh is a wetland at the northern edge of San Pablo Bay, which is a northern arm of the San Francisco Bay in California, United States. This marsh has an area of 48,000 acres (190 km2), of which 13,000 acres (53 km2) are abandoned salt evaporation ponds.[citation needed] The United States Government has designated 13,000 acres (53 km2) in the Napa Sonoma Marsh as the San Pablo Bay National Wildlife Refuge.[citation needed]