Yes, more food is definetly necessary as I go farther. So far I have gotten away with two 24oz Gatorades and a GU gel (Expresso Love is my favorite). I did find my stomach growling thie week. It is funny how you adapt when I started riding seriously last Aug 10-15mi was tough, now I do 20mi at least 4 days a week and try to get at least 50mi on Sat or Sun. Now I look at 100mi and say no way I can sit on a bike that long, although I am sure going to try at some point. I think the key for me was finding a riding buddy that makes me feel guilty if I slack off.