This was my 4th run of 20 miles or greater since the beginning of October and I am certainly feeling comfortable with the distance. Nutritionally the thing that seems to work the best for me during the run are Cliff ShotBloks in Cola and Margarita flavor. They sit on my stomach just right and don't cause any gastrointestinal distress like gels or a mixed high calorie liquid fuel. They also come in neat tube like packaging so they are easy to manipulate while running. The cola has 1 shot of espresso in it and it seems to really perk me up mentally and helps me focus in the later stages of my long efforts. The Margarita flavor provides some much needed sodium and electrolytes. I eat 3 to 4 packs of these over a 3 hour run - about 600 to 800 calories, so about 250 calories an hour. As far as hydration I've just been sticking with plain water - about 40 ounces per 20 mile run in the fall weather we have been having.
I have the day off work today so I had planned a 5 mile run and also to get on the bike, but just so happens there's a tropical storm moving through the state. If the rain would just slow down a little bit I could get the run in, and then sit on the trainer for an hour later this evening.