Hydration
You need about half a liter of water or sport drink per hour for runs lasting over an hour, more on warmer days.
Simulate your hydration and nutrition intake during your training; if you will drink every two miles in the race, drink every two miles on your long runs and time your calorie intake accordingly.
We stock hydration belts, packs, and hand-helds by -
Amphipod
Nathan
Fuel Belt
The North Face
Ultimate Direction