I don't know what exactly qualifies as a long distance ride for purposes of this discussion, but I just did my first metric century last weekend. Sure it was a hot August day, but I went through 8 bottles of water and a bottle of iced tea the lunch stop. My normal training and club rides are usually 15-30 miles and I have found that I average about a bottle of water every ten miles so carrying two bottles on the bike is usually just enough. Anyway, what do you guys do for water on the long rides that last several hours? Are you accustomed to drinking less, do you bring more with you somehow, or do you simply stop at gas stations, etc.?