‘Double Point’ Area of Special Biological Significance (ASBS), located in Marin County, has only 0.7 miles of coastline; a portion of the ASBS lies in the Gulf of the Farallones National Marine Sanctuary. This area is in a rural part of the Point Reyes National Seashore, and the National Park Service manages the shoreline. The area surrounding Double Point is accessible only to hikers, and has primitive trail camps to the north and east of the ASBS.

Overflow from the naturally occurring Pelican Lake is the main drainage source into the Double Point area. This lake appears to have little or no access to hikers and is located in a wilderness watershed.

Key pollution threat is storm runoff.

Double Point ASBS features one of the largest populations of harbor seals in the world. Stormy Stack is the second largest bird refuge in Marin County.

ASBS Area: 89 acres

County: Marin

Regional Board Area: San Francisco Bay RWQCB

Year designated: 1974 (Resolution 74-28)

ASBS Index No.: 13