As my friends and cohorts prepare for the Rocket City Marathon (start=7 a.m.), I find myself wishing I had signed up. But then I remember that I don't like running long distances on roads. I much prefer trails. I came across this blog that explains the difference pretty well: http://througharunninglens.blogspot.com/2012/08/road-vstrail-marathon-its-mental-thing.html 

Here's to all runners, no matter the venue or the difference!