If you do not trail run or have never tried, you are really missing out. It is a completely different experience from road racing in that there is always a root or a rock just waiting to help you fall flat on your face. No cars, just the sound of the wind as you climb or descend until your heart is beating out of your chest. Stoopid me, I just signed up for a 5 mile trail run at Harris Lake south of Raleigh this Saturday. 
What was I thinking????
Wish me luck, because I seem to have a terrible habit of tripping. The course looks awesome and scenic, though I won't notice because I'll be too busy looking out for dead bodies.