I rode the Keystone MS150 this weekend. About 75 miles each day through rolling country roads. I averaged about 14.5 mph on both days. The first day I started with my group, but they outpaced me after 20-30 minutes. We regrouped at each rest stop and repeated this throughout the day. Yesterday I just did my own ride and never saw them after the start. The ride was extremely well organized, roads were marked, most intersections had people flagging traffic, there were lots of support vehicles on the road and plenty of food at the stops. The weather was overcast and cool the entire weekend, just perfect for cycling.