I hit 47 mph on the descent (from 45:00-50:00) on my mountain bike today and also rode myself sick. The two big climbs above I held HR 161-171 (just a few ticks under LT) which, after the run, was brutal. Solid day just shy of 4 hours.
I keep being amazed at Matt Hart's 100,000+ of vertical in 7 days (on freaking skis no less). I think those kinds of endeavors appeal to me more than killing a bunch of races. I am an admitted training junkie and 'anti-racer'. Back in the day (I'm an old has been now) I would put up solid training numbers but never truly raced well because of it. I've always enjoyed the journey more than anything. I keep breaking down the numbers to see what I might be able to put up for a big week of verticality. With two kids and being a stay at home dad though I can't train all day anymore. I do have a 1 mile 1300ft foot climb and the Powerline route in my back yard. Getting 14,286 ft per day though? I can certainly imagine doing it... and that's where every journey begins.