I got there about ten minutes late, and everyone had left, so I raced to catch up to them. I finally caught the B group, which had three guys, including John, Mark and David at South Street and Concord Street (aka Lowell Road) which is at mile 14! We stopped at Great Brook at mile 21.5, and the A group said they were only there for a few minutes, so I guess we were going at a good clip. We ended up riding together as one big group, and I was in the middle of the pack, I got tired on some of the hills later on but powered through. My seat was a little sore, perhaps from using the bib shorts, which I hadn't used in a while. My right knee was also a little sore, all week it has been hurting, I am wondering if my seat is a little low on the Diverge. It was a perfect day to ride, after the last week of heat humidity and pouring rain.