I just bit off more than I could chew in the hills yesterday. It was fun in the beginning, but I soon realized my route had too many miles and vertical feet. Nothing like being 30 miles from your car with a mountain in the way. End result -- I didn't bonk, but I blew an entire day and I'm still pretty wiped out.
Assuming I recover to a stronger state, is there any training benefit to these 8 hour slogs versus a 2 hour fast group ride or intervals?