The Spartan Race: What am I thinking?

So my friend calls me, and tells me to visit the following site:

http://www.spartanrace.com/

and then proceeds to ask me if I want to do this race. I say yes, and then look at the time frame I have to train and think that is very quick! I can do the running portion (I am doing the Soldier Hollow race in Utah on July 9th, so it is 8 miles), but I had back surgery last year and am still working up my strength, so wish me luck. I will post about it after the race of course.