I haven't run a marathon since I was 26, and I'm 48 now, but I do miss the crowds and the cheering. I did some big events, Marine Corps marathon being one, and there were a lot of spectators. The thing about running was that I would end up going on auto pilot. You can't do that on a bike, for some reason the cars are more dangerous to cyclists. I am going to spend the next 2 weeks eating all the right stuff for our next century on Aug 1st.