Coastal Estuary with sand bar aprtially closing river mouth draining into the Pacific Ocean. River banks are steep brown undeveloped hills.

Estero Americano

The Estero Americano watershed covers 49 square miles. It forms a portion of the northern boundary between Marin and Sonoma counties where it drains into Bodega Bay.

The Estero Americano is a coastal estuary at the base of Americano Creek, the estuary's sole tributary.

In some years, a seasonal sand bar at the mouth restricts tidal exchange. When the mouth is open, the tidal influence ranges up to 4 miles upstream.

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