is separated from the rest of California by the San Andreas Rift Zone, the northern half of which lies below sea level, flooded to form Tomales Bay
, a narrow inlet 13 miles long and less than one mile wide. The bay is bordered by quite steep, densely forested slopes on the west side and less wooded, more gently undulating land to the east. Two sections of the shoreline on either side are part of Tomales Bay State Park
, which has a reasonable range of facilities, including several short trails.
: Tomales Bay State Park