Thank you all.
I am doing my first Metric solo this Saturday. The century gives me 10 hours to complete and my goal is to complete at a 12 mph average so a little over 8 hours. I road a VERY slow 40 miles this weekend with my 13yr old daughter and her friend which was 6 hours saddle time so this shouldn't be much longer, just faster. It will be interesting to see how the mental aspect plays out and I think that is why I want a ride partner. We can goad each other on when the other is ready to call it quits.