I tackled a 60 mile route today:

http://www.kybikerides.org/ridemaps/1306.htm

It was fairly hilly but we traveled some beautiful roads in and around my area. We even rode some of the OKHT route today. It was awfully hot and humid today. When we started a little after 8 a.m. it was already in the upper 70's. I know by the time we got back to our cars the temps had to be in the mid 90's and I'm sure the heat index was close to 100. It was just plain HOT!

I rode a century yesterday and decided to ride the 60 mile club ride today to simply see if I could handle two hard days back to back. The group I rode with today was slow so my average time was dismal but even with that once my legs warmed up I did okay. I often rode ahead of them and waited at each intersection. I'm now giving some serious thoughts to the 100 mile course on first day of OKHT and the 55 mile return ride on the second day. I'm beginning to think I can do this challenging combination.