Valley, where upwards of 40% of the Lagunitas Creek salmon spawn each year and where as much as 1/3 of the juvenile salmon (or fry) spend their entire freshwater lives. Roy's Dam on San Geronimo Creek was built in the 1920s to supply water to a ranch. It was an obstacle for coho salmon and steelhead trout trying access to the habitat upstream of the dam for spawning. It was decided to lower the dam instead of completely removing it because of the large amount of sediment that had accumulated behind the dam. This re-opened critical spawning habitat no longer available on other Lagunitas Creek tributaries. The Salmon Protection and Watershed Network ([1]) leads winter tours for the public to learn about and view these spawning salmon, and also leads year-round opportunities for the public to get involved in stream restoration, monitoring spawning and smolt outmigration, juvenile fish rescue and relocation in the summer, and advocacy and policy development. In the fall of 2017, two additional salmon species appeared in Lagunitas Creek, pink salmon (Oncorhynchus gorbuscha) and chum salmon (Oncorhynchus keta). Pink salmon, also known as humpback salmon, rarely spawn in coastal streams south of tributaries to Puget Sound in Washington state, although they were reported as far south as the San Lorenzo River in November 1915. The southern limit of spawning chum salmon, also known as dog salmon, is Tillamook Bay, Oregon although they were also reported in the San Lorenzo River in 1915. As of December 2017 a half dozen chum salmon and a dozen pink salmon were counted in Lagunitas Creek. Below Kent Lake and the San Geronimo Creek confluence, the mainstem Lagunitas Creek courses through Samuel P. Taylor State Park, which hosts 600 acres of redwoods (Sequoia sempervirens) virgin forest. Remnant populations of the foothill yellow-legged frog ((Rana boylii)), a Federal Species of Concern and California Species of Special Concern, persist in Little Carson Creek and Big Carson Creek, tributaries of Kent Lake. In literature Under the name Paper Mill Creek, Lagunitas Creek is referred to, and crossed several times by car, in the course of Confessions of a Crap Artist, a 1975 novel by Philip K. Dick, partly set in Marin County. Lagunitas Creek is cited in Jane Hirshfield's poem "Mountainal," from Ledger (New York: Knopf, 2020), p. 111. See also List of watercourses in the San Francisco Bay Area Samuel P. Taylor State Park