Robert Doyle was born in 1952 in Concord, California. He was first introduced to Mount Diablo as a Boy Scout and developed an interest in science and environmentalism at a young age. He became involved with Save Mount Diablo in 1971 shortly after it was founded. He worked with the organization until the 1980s when he was hired at the East Bay Regional Park District, though he continued to be involved with the organization individually. In this interview, Doyle discusses his early life, education, developing an interest in conservation, the early days of Save Mount Diablo, working closely with the founders, involvement with environmental activism, hiring Seth Adams, transitioning to the East Bay Regional Park District, how his work there overlapped with Save Mount Diablo, the role of land acquisition in environmental conversation, the importance of parks, and his hope for the future of environmental activism.