The president of the Yosemite Association, Steven Paul Medley, ’71, of Oakhurst, Calif., died in a car accident October 5. He was 57.

Medley had led the nonprofit, dedicated to educating the public about the national park’s plants, wildlife and history, since 1985; its membership grew to more than 11,000. He wrote or produced more than 50 publications, including guidebooks, children’s books and maps. His The Complete Guidebook to Yosemite has sold nearly 100,000 copies.

A Palo Alto native who grew up in Gilroy, Calif., he began working at Yosemite as a seasonal ranger. He earned a master’s degree in library science from the U. of Oregon in 1975 and a law degree from UC-Davis in 1981.

Survivors include his wife of 30 years, Jane; three sons, Charlie, Joe and Andy; his mother; and one sister.