March 8, 1967 – The San Francisco garter snake was listed as a federally endangered species under the U.S. Endangered Species Act.
1971 – The San Francisco garter snake was listed as a state endangered species under the California Endangered Species Act.
September 11, 1985 – A final recovery plan was published for the garter snake.
May 30, 2007 – The Center filed suit against the Environmental Protection Agency for authorizing use of at least 17 harmful pesticides in proximity to San Francisco garter snake habitat.
September 24, 2008 – The Center filed notice of intent to sue the city of San Francisco over harm to San Francisco garter snakes at Sharp Park Golf Course in Pacifica. The Center unveiled a campaign to restore Sharp Park as a coastal wetland habitat for garter snakes and the California red-legged frog.