At the park where I ride, there is a stream, thats about 15 ft wide, and 1 ft deep, The trail dips down to it, then on the other side dips back up. I fly throught it at about 20 mph, get soaked and keep on going. cleans my bike off too. Only problem is their is a lot of mudd after it.
I love mudd to, and jumps, and logs. But I love that stream the most.
Whats your favorite trail obstacle??