Good for you. I have run several of these and they are challenging but very fun. You will meet a lot of people during the warmup session they have before the run. It will help when you need assistance climbing over some of the obstacles, but running with the kids should be a sufficient team to get you through. You will never see a more willing group of people who want to see you succeed than at these events. It's not a race, so time is not kept. The ones I have run were in the 12 mile range, I believe they are all in that range. You will get some rest at the obstacles as you wait to go through them because of the lines, not much but a little. If yours is like ours, in the mountain, then try and train a little at altitude, or at the very least get up there the day before and get a "little" acclimated to the difference in air pressure etc.
It will take several hours to finish, so take some energy tablets, they sell them at most sporting good stores. Gatorade makes some that don't taste too bad. They do have stations that give out banana and water throughout the event. Don't worry about the electric obstacles, they only shock for a second. Focus on the finish and great job in getting in shape. Cherish the orange headband you get and show it off when you get home.
Good luck,
Rob
