Several years ago, I was flying down a trail on my mountain bike, and a skunk comes wandering out across the path right in front of me. There's was no way to stop in time, so I pedalled harder and faster than I thought possible. Fortunately, he ignored me. I've also seen several armadillos wandering around.
And another time I went riding after a light rain, and was the only one at the place. Back in the trees, I spotted large cat tracks. I asked the guy at the gate about it, and he said, yea, there's a big cat, a cougar or something, that lives back in there. The kinda spooked me.