Found on the crawl in Santa Cruz Co. Left it that way after taking a couple of photos.
on a trip to view zonata and crotalid
Sierra Mountain Kingsnake
Elevation: Around 5700'
The head is indistinct in the second photo because of a curious head shaking behavior.
On the crawl.
Lampropeltis zonata, or the California mountain kingsnake, is a species of nonvenomous colubrid snake, which is endemic to North America. It is a coral snake mimic, having a similar pattern consisting of red, black, and yellow on its body, but the snake is completely harmless. Five subspecies are recognized, including the nominotypical subspecies.