The one in Amesbury I would imagine. Tons of fun, but they weren't planning on the 3 inches of mud in the entire course. Nor were they counting on the Warrior Dash Rash that lots of people seemed to pick up. Looked like poison ivy, but didn't seem to be, some doctors thought it was a reaction to a mold in the mud or some such. It was one of the few races where everyone seemed to have a fun time. No hardcore runners gunning for a new PR, just muddy dirty fun. Twas expensive though. Would have been interesting to have zombies grabbing at you.