No long run today

I've been suffering from some sort of gut issue the last couple of days. So I'll skip my long run today. I started a new running program this last week (a 16 week schedule geared toward running a marathon). Today should have been a 12-mile long, slow run. I will probably have to punt on this run until my gut feels better. I hate to get behind, but it is better than having a miserable run or hurting myself. My real goal is to run 50 miles in the Desert Rats Trail Festival in Fruita, Colorado in April 2009, so if I miss a run here and there, I think I should still be fine. Besides, next week, I am already going to run a 7-miler at Palmer Park in Colorado Springs.