651? Now they're just making up numbers. I have a single ride with a score above 400, and just six above 300. The 400 score took 154 miles @ 17mph. If I recreated Saturday's Z5 effort for 100 miles, I'd barely even break 500. I mean, if it were possible. I don't think Z5 for 5 hours is a thing.

I dug around to find something close to your 47 miles w/ 5200ft-- I had a 46 with 5100ft and got a 200. :|