Mary, you obviously are taking well to long distance riding- maybe you should think about doing a brevet series next year! When I did mine this year, I didn't think past the 200k (124 miles) but the series is spaced so the rides themselves build you up, (and you just do maybe a Century or something in between) and you end up, hopefully, being able to do the whole thing! The really great thing about doing long rides every weekend like you are is once you build that base, it's very easy to maintain.

Nanci