Sounds like you were super dehydrated and hadn't done enough long rides to prep for this one. To train for distance you should be able to go at least 75% of the goal distance at a slow, low heart rate pace (ex. you should be able to comfortably ride 75m at about 60% heart rate before you do your century). And like someone said, you have to build up gradually, adding about 15%/week. Your body needs to gain endurance and you get that with gradual long rides. To train for the hills and being faster, do hill sprints a few times a week. It's the combination of endurance training and intervals (be they sprints or hills) that will get your in the best shape for the ride. This kind of training is regardless of the bike you’re riding.

And dude drink more water and throw some Cytomax or Gatorade in it to keep your blood sugar up. You should never be thirsty during a ride. That will make you tired, crampy, slow, and freakin miserable. Pound the water a few days before to ensure proper hydration, don't just rely on water on game day.

And the day before a big ride, you don't have to lay on the couch, but take it easy. The combination of a ride + hockey may have set you up for tired muscles the next day. A short slow ride will keep your muscles limber for the next day. Eat well, too. Lots of carbs (not all beer) and protein and a little fat to burn over the distance.

I think shooting for the 62m group ride would be a great goal in 2 weeks. Compare that ride with this one and I bet you see a big difference. Good luck!