It may be of a surprise to you but european explorers were oblivious of San Francisco bay existence for quite a while. For example Sir Francis Drake most likely stopped to careen his ships in what is now called Drakes bay during his 1579 circumnavigation voyage and search for a North-west passage. English later were trying to use his landing to dispute Spanish and American claims on California.
The mountain is a birthplace of mountain biking and had been mentioned in The Dharma Bums by Jack Kerouac - the book made me fall in love and eventually move in with California.
Also this is the place where apes from Dawn of the planet of the Apes live.
Need to confess - as a kid I spent an unhealthy amount of time playing Diablo and Diablo II games. Dark atmosphere, fast paced real time isometric combat and RPG elements made for an ideal mix. While I could spend more time studying instead of wasting time playing games there is hardly any other piece of media that made me wish to become a software engineer more. Well, maybe Might & Magic VI. And also probably Doom. But Diablo is definitely one of the trinity.
Why do I mention that? Because Diablo game had been named after Mount Diablo. Don’t trust me, check David Brevik talking about the game.