River Wetlands State Park
The long shore currents of the ocean are continuously depositing sand on the beach at the rivers mouth. Periodically this sand gets built up into a sandbar and the river no longer flows freely out in the ocean. Instead, the water flowing down the river fills up the lagoon and backs up into the marshy area behind the lagoon.
After a rainstorms, when enough water is flowing down the river to break through the sand bar the lagoon finally begins to empty and the river flows into the ocean once again.
water in the lagoon and marsh is combination of fresh water and salty
sea water, it serves as the life blood for the very productive plant
community of the marsh.
River also hosts the southern most major steelhead trout run in North
America, with approximately 2000 adult fish
the southern end of San Francisco Bay and Morro Bay, a distance of 160
miles, the coastal salt marsh habitat is found