I've finished this twice and did a 20 mile workout once; it's a great small marathon, 500-1000? (I'm guessing). best features: you start in shade early in the morning in late Oct., after a few miles you're on a bike path and dirt paths for a good ten miles or so in complete shade along the river, it is so dark and cool and a great way to spend the first half; last half is suburbs and city streets and it is NOT scenic but for me the first half makes up for it. Crowds are slight but hey I don't need crowds. Race organization is superb, with many volunteers.