Don't forget about the old standby--'taters and salt! Pretty gentle on the stomach, and a good starchy source of energy. I've found that they tend to help "buffer" some of the other junk I tend to scarf down at ultras.<br><br>
When I first started with longer distances, I found my digestive system would really just shut down. I could eat to a point (and only certain things really--which was mainly power bars), but after that it seemed like nothing would digest, and I would feel truly ill.<br><br>
Eventually, with training, I found that I could push the limit, and my system was able to keep moving. I think this really happened after my first 5+ hour training run. Only certain things were appealing at first. But I would bring a variety of foods with me and tried them in doses.<br><br>
These days, I've found myself able to handle just about anything, at least on a 50-miler. At Bull Run, I went into the "Do Loop" carrying 3 cheese quesadillas smothered with guacamole, a half a beer, and a mouthful of m&m's. After eating a few potato slices of course <img alt="smile.gif" src="http://files.kickrunners.com/smilies/smile.gif">