The new trend that I've noticed these days with respect to racing is the "mud events." I've seen ads for the Muddy Buddy, Mudstache, Warrior Dash, and the Tough Mudder.

Now, the Tough Mudder bills itself as the toughest event on the planet. Has anyone at this site run one of these events? If so, what are your thoughts? Is it really all that tough, Is the Tough Mudder really the toughest?

Thanks for your input.