Wow! You all sound incredible. Very long distances and fast paces. Must take alot of dedication and love.

I am a slow-poke. 14-15.something mph is usually my average speed. But it is kinda hilly around here.
I will be 44 this year and have been riding since 2008, minus the winters. In ok shape for my age I think. 5'7" 175 lbs. My only exercise is commuting. I am not an athletic type at all.

Last year I did a 50 miler, and that was pretty easy, but I did train a little. It was undulating terrain that got more undulating the further west I went.

I want to try to see how far I can go with no training at all, just for fun. Just so I will know what I can handle. I'm not talking about going till I bonk, but going til I feel it is enough.

There is a cool route that runs west straight from my home to a bike shop 20 miles away and I could use that route as it is easiest for the wife to find me if I do bonk. It is pretty much up and down the whole way with the hills getting much larger the more west you go. It would be interesting to see if I could go all 62 miles for the metric century without any training just to learn my baseline limits.