Or at least that is the tagline.
I just registered for it. I'm on a team with 5 other guys right now. 5 months to train and get my arse in shape for it. I'm on my 3rd day of P90X and went for a 4 mile walk with the baby in the stroller today.
Tough Mudder - Probably the Toughest Event on the Planet
Basically it is a 10-12 mile course with 25 military style obstacles, team style. Should be fun.