Looks like a coyote with mange. I used to live in So Cali and have seen plenty coyotes and mange is a common ailment that makes them look extremely
bizarre. Very like that photo.
It's size is peculiar, though there isn't concrete comparisons in the photo. Could be a wolf/coyote hybrid, which isn't outside the realm of
possibility.
Or it could be a giant hellborn, man-eating beast of doom. Your choice.