The Sonoma Coast
With the long standing exceptions of coastal towns and land holdings, much of the Sonoma Coast is administered by the California Department of Parks and Recreation, currently headquartered in Duncans Mills. 
Sonoma Coast State Beach

 
The California coastline, to include all of the Sonoma Coast, can be viewed on Kenneth Adelman's The California Coastal Records Project, a web site of outstanding photographs documenting the entire California coastline.  What better place to get to the coast than through the town of Jenner.