I tried to post an answer for you last night, but it apparently didn't work from my phone. It depends who shows up, and how hilly the ride is, but those of us riding long right now average anywhere from 14-18mph+ over 70-100 miles. We usually end up in small groups and regroup once in a while. Once the regular ride season starts, you'll find riders of all paces.

Great ride today. Best ad hoc ride I think I have been on. I will say that it was entertaining listening to everyone trying to decide which way to do when we got to the stop signs. Thanks all it was fun. Only other thing I can say is if you make a hell route you have to show up to ride it or we get to do this again.