And then do it again the next day. And the next. And so on. I don't think I would be able to walk after two back-to-back 100km days, and these guys are doing

And then do it again the next day. And the next. And so on. I don't think I would be able to walk after two back-to-back 100km days, and these guys are doing double that with a lot more climbing nearly every day for over three weeks straight.