Get a hydration pack. I can easily go through a two-liter Platypus plus both my water bottles on a 3-hour ride.

Unfortunately I don't have a way to carry water on my runs and I'm going to have to figure something out. I'm the gal who sweats out a liter an hour when it's 75 degrees F.

I hate having anything on my back when I ride too, but it beats the heck out of heat stroke.