When I mountain bike around here I see tons of deer and hawks (love watching hawks). But my scariest and most excelerating sighting was a bobcat on an early morning ride. Big sucker, but with a short tail, so it was a cat, not a lion. A few days later on the same trail I saw a coyote. I've also seen mountain lion foot prints, but I don't usually ride early enough to see lions, thankfully. Their paw prints are rather intimidating.