For the more information about the air resources of the National Park Service, please visit http://www.nature.nps.gov/air/.
Audubon Canyon Ranch
Audubon Canyon Ranch is the largest known nesting area for great blue herons and American egrets on the Pacific Coast.
Location: Marin County, CA
Year designated: 1968
For additional information see:
Please remember, National Natural Landmarks (NNLs) are not national parks. NNL status does not indicate public ownership, and many sites are not open for visitation.
Last Updated: June 28, 2012