I used to do a ride that was 40 miles and had a 4000 ft climb at the beginning that was over about 11 miles or so, and rides that were more than 70 miles and probably comprised about 4-5000 ft of climbing overall, but what you've got there looks like about 8000 ft over 60 miles: seems pretty tough by my standards. I was on a ride like that years and years ago, with two buds, probably about 80 miles, and families were stepping over our bodies as we were practically passed out on the cement walkway to the Der Weinersnitzl, and it was getting dark, and we were still about 15 miles from home. Good Luck
