Nothing hugely scary or weird, I've come across a few rattlesnakes. Once I saw something cross the trail 100 yards or so in front of me and couldn't figure out what it was - it was like an oversized cat. It might have been a bobcat, I couldn't be sure. Another time something leaped from the leaves on one side of a dirt road to the other and disappeared into the leaves. That turned out to be a hawk hunting. That was pretty cool.