I bonked at less than 20 miles of a ~25 mile ride. Sigh. I'd been a dork, having a "fat day" -- I had hardly eaten all day and then figured that riding on an empty stomach would burn calories. Yeah it does -- burns the glycogen right out of your muscles so you've got nothing left to run on! I barely maneuvered into a parking lot, couldn't even stand when I tried to get off the bike! I remember the sweating, clamminess...I felt really drunk or something. The sun was setting so while DH went to get the car and come back for me, he urged me to try to get home. I had to walk my bike on sidewalks up the hill and then coast the downhills home! How embarrassing, and horrid-feeling. Iccccch.

Last weekend's 57 miles I didn't bring enough food, had a Clif bar at 1.5 hours but started getting fatigued just short of 3 hours.

Moral of the story: Eat well before riding, then get a good munchie in you starting at 1.5 hours and then every hour thereafter.