I ran this one last year, and yeah...half a mile in, this butter huffer in front of me STOPS AND WALKS. I bumped right into her fat ass.  And she wasn't the only one!  It took me 5 miles to get past the "walkers"...who fucking walks in the D corral, a HALF MILE in?  I am beginning to think maybe only running in cold weather places.  Fats hate the cold, and won't attempt 40 degree temps to get that t shirt and medal.  My theory, anyway...