MARY BOWERMAN She wrote the book on Mount Diablo plants. She co-founded an organization to defend the mountain from subdivisions. The rest is Save Mount Diablo history . . .

Presented by Save Mount Diablo, in partnership with Mount Diablo Interpretive Association.

Featuring Heath Bartosh, Seth Adams, and Robert Doyle

Photographs: Scott Hein, Stephen Joseph, Troy Montemayor

and Seth Adams, Heath Bartosh, Steve Edwards, Brad Heckman, Helovi/istock, Joan Hamilton, Shawn Hanrahan/Texas A&M, Jepson Herbarium, Al Johnson, Neal Kramer/Strybing Arboretum, SWKrullImaging/iStock, Kit Leong/iStock, Marshman, Troy Montemayor, Carl Osborn, Bill Sattler, San Ramon Valley Fire Protection District, Arturo Reina Sanchez, Spyglass Hill, Terry Tomkins/USDA, Charles Webber/Cal Academy of Sciences, Westphalia/iStock

Music: Podington Bear