Blowhole is located in the North Central Coast region of California on Southeast Farallon Island, within the Greater Farallones National Marine Sanctuary. This site is located within the Southeast Farallon Island State Marine Reserve and Special Closure. This site is also located in an Area of Special Biological Significance (Farallon Islands ASBS) and is contiguous with Farallon Islands National Wildlife Refuge, which is closed to the public. This moderately sloping site consists of moderately uneven terrain, containing few cracks and folds.
Blowhole is dominated by consolidated bedrock, and the area surrounding the site is comprised of consolidated bedrock. The primary coastal orientation of this site is east.
Long-Term Monitoring Surveys at Blowhole were established in 2017 and are done by Greater Farallones National Marine Sanctuary. Long-Term MARINe surveys currently target the following species: Mytilus (California Mussel), Endocladia (Turfweed), and Pisaster (Ochre Star). For more information see the Long-Term trends at this site.
For more information about Blowhole, please contact Jan Roletto (jan.roletto@noaa.gov).