Saturday I biked a Century (100 miles), which was a lot harder than I thought it would be.
The middle 16 miles are on a highway, and not a trail. That puts you in the direct sun and very rough blacktop from Rockmart to Cedartown, which makes for a draining adventure. I also ran out of water for 30 miles, which was horrible. But, I did finish in a little under 7 hours, albeit in the dark, with an average speed of 14.7 miles and heart rate of 140 bpm. It was the first time in a long time where my legs have ached during the ride.