Titan5 Challenge, Petersburg

The only thing you'll win at the Titan5 Challenge is bragging rights. During the event, no timers tick the seconds by, and no trophies or gold medals wait on deck for the winners. But that's no matter—the pure fun outweighs the possibility of winning a first-place prize or senate seat. Whether they opt for the 5K or 10K course, participants will climb over logs, brave rushing rivers, crawl beneath cargo nets, and navigate rope swings. And on top of all of that, they'll be wading through mud—lots and lots of mud—on their way to the end. All the while, kids can get muddy too in their own abbreviated Mini Titan race. Afterwards, everyone gets a medal just for finishing before joining together for a raucous post-race party devoid of any gloating or sobbing.