Stap, you must live in some very hilly country. Where I live in middle Georgia is not a mountainous area, but definitely not flatlands either. According to the tracking I have seen, most of our hardest rides are about 70 ft. of climbing per mile and typical routes are around 50 ft. per mile. Do you really climb 200 ft. per mile? Wow!

On my 53rd birthday I would have to ride 76 miles of the hilliest routes I could find or 106 miles of the normal routes. Not out of the question, but not something I'll commit to right now for my birthday ride. On the other hand, I will definitely plan to do a few rides with that much or more climbing at some time during the year.