My old Ranger buddy and I were going to do this. Then we realized our less then stellar finish in the Warrior Dash. We were far from last but definately not first. Too old for the Darby Queen here. Turns out, you have to train for this one. My wife and kid and work said "nope". Looks like fun though. Good luck.
I might go anyway and be the straggler for the trucks to come pickup.
It's not about your time but finishing. I picked my ass up off the desk and did the colorado one last year, it's as hard as you want to make it.