A wallaroo. They're a smaller relative of kangaroos.
I got up early one morning, and instead of riding to the beach, decided to go ride in some bushland between the park and the hospital. He was right in the middle of the trail, and I'm not sure which one of us was more surprised.
Living in SoCal, I was used to seeing deer, snakes, rabbits, and even the occasional coyote. But nothing could have prepared me for the one and only wallaroo I've ever seen.