Gladiator Rock 'n Run

I'm currently trying to get a team together for the Gladiator Rock 'n Run in Irvine next month. http://www.gladiatorrocknrun.com/index.html I ran in a mud run several years ago at Camp Pendleton. It was a blast. Immediately after that run I wanted to do it again. Well, I never did. But it was a blast and this run looks shorter with more obstacles. Definitely my speed. I used to do long distance running when I was in grade school and into high school. But my knees no longer like that stuff anymore. I figure I can get through 3-miles without a lot of extra training or more importantly, injury.