A few years ago, on a hike somewhere in the CA coastal range (maybe it was Mt. Tam, maybe Muir Woods...) I saw a smallish snake just off the trail in the process of swallowing a banana slug. I didn't have a camera with me, and I really regret that because it was awfully cool. And because I've got no idea what kind of snake it was - dark, solid brownish, no markings that I can remember.