I've no idea if there'll be an interest in this. But I've always struggled to get the 100 mile challenge due to where I live in the hills. I'm not the only one I know, so how about using this thread to log a 5000ft / 1524m rides with no min or max distance or timescales. The only rule being, it's one ride. Where I live I can do this challenge in less than 50 miles.