You said you did 60 miles, but how long did it take? We did a 26 mile ride yesterday in just about two hours and all I had was about a half a bottle of Gu Brew and water, no solid food. If we had been planning a longer ride, I would have started eating at about the 90 minute mark. On a long ride I try to eat a little bit every 30 minutes. I have a Bento box by my handlebars with food just dumped into it, usually Jelly Bellies, that I can easily grab while riding. That sounds like a lot of food to me. That's about how much solid food I would eat while doing a 200K, which would take between 10 and 11 hours including a meal stop

I think hours spent riding is just as important as the miles. On my mountain bike a four hour ride is only 24 miles or so, but I need the same amount of food as a 4 hour road ride.

Veronica