Training regimen

I ride a 10.7 mile loop. That way, if I have a flat, my wife or daughter can quickly come to my aid. I did 3 circuits this morning and plan on 3 more this evening. My target by mid-August is to be able to do 70-80 miles back to back two days in a row. I am sure to have calluses on my Gluteus Maximus by then. I will then be deemed ready for the X-country ride.