Do the old weighing-yourself trick to make sure you're drinking enough water. Weigh yourself before and after your ride - for every pound you're lighter, you're one pint of water short. One bottle per hour is not even close to nearly enough for me even in cooler weather, but everyone sweats out differently. That trick doesn't say whether or not you were well hydrated before you weighed yourself the first time, but it's a good yardstick.

But... I've never, ever in my life had a quadriceps cramp. Yowch, just thinking about it hurts. I wonder if it just has more to do with the kind of riding you're doing. When I come to Florida for the winter, those long, hard, windy spins in the saddle are totally different on my body than the constant short, steep hills I do in the summertimes. When did you move; are you from the hilly part of Georgia; and did you start getting the cramps right away?