I agree, I'm afraid for scaling the 12 ft walls, that's my fear - but they have SO many ppl there to help you through - the aim of the challenge is not to leave anyone behind so ppl finish it together.
Lovely - I'm also working my way up to a 10k, currently running about 4-5 miles now, working up a mile/month is my goal -when I get to 8 miles, prob around July/August I'm going to start stopping every mile to do a challenge [burpees, pushups etc] to try to simulate the challenge. I'm also doing heavy bag kickboxing during the week [it's 1/2 on the bag, 1/2 squats, burpees, abs, planks, push-ups, military drills] so that's helping.
Also, I'm told 24 hour fitness had tough mudder classes every Sat. for $15 so I might drop in to a few of those as well. That's my current plan. I'm going to re-evaluate it after the race in June to see how I am by then on the obstacles.