Sub-5 Hour Century Course Ride

Today 8 of us joined 5 other Sub-5 riders for a 2 lap preview of the actual Sub-5 Century Route. We met at the Hampshire, IL High School parking lot at 08:00. The day started with some clouds and light rain. We started the ride as non-rotating double paceline. The pace was brisk, everybody was feeling good. Few miles into the first lap we started to do a variant of the double rotating paceline, where the rider at the front of the fast line will move over to the slower line and hold it there for a short period of time. Two thirds into the first lap Hugo pulled the same inner thigh  muscle that he recently injured and slowed down. Cons and I slowed down to wait for him. We tried to follow the main group, but we could not see where they made a turn. When we reached the end of the road we made a turn based on gut feeling. It turned out, we went in the wrong direction. After realizing  the mistake, we stopped and resorted to technology. We used the phone GPS for directions. It took several minutes to acquire satellite signal and download the maps (no 3G connection there). We followed the directions until we ended up at the I-90 entrance. At that point we re-routed (going back for a while) and made it to the High School Parking with extra 10 miles on the odometer. Few of the other riders had already left. Hugo and Cons left too. Hugo decided not to push further and risk a more serious injury, Cons was going to be late for a birthday party. The remaining seven of us started the second lap of the course. This time we were doing the rotating double paceline. It was mostly smooth in the beginning, but as we progressed and got a little tired, we started to open bigger and bigger gaps. At that time the wind had picked up a little bit and was in our faces. That added more stress on everybody. With 3-4 miles left, we resorted to a single paceline. At the end of the lap, there was a hill, not very steep, but made us slow down. Randy and Martin reacted quickly and we were back on track. Everybody seemed happy when we arrived at the parking lot. According to the data from the Garmin of one of the riders, we did the first lap at 20.6 mph. The second lap was almost at 22 mph. The question remains if we can maintain the pace for one more lap?