That might be it... I drank a lot the night before because I didn't drink nearly enough during that day or the previous day. And my riding buddy and I went to Starbucks before the ride while we waited for no-show folks.
My longest ride to date was 32 miles and I drank 2 liters water and 1 and a half bottles of gatorade and didn't have to take as many breaks as I did this past weekend. But, the temp was over 100 for that ride so I was definitely sweating a lot more of the water out :)
I may have started that ride a bit dehydrated, though - I was totally wiped out by the end of it which is definitely something I'm trying to avoid in subsequent rides...

