So set yourself up at the front near the start line, run the entire thing, then finish & go home. Seriously, you won't be bothered by the fats, because you'll never see them after the whistle blows. Hell, I purposely start at the back of the field, just so I can shame them all by blasting past them in the first 1/8 mile, and once they're behind me, it's like they never existed. I even hang out for 20-30 minutes at the finish line sometimes, and still never see a fat arrive.