Today's stage 11 is considered one of the toughest in the tour, and its major climb is the Col du Galibier at 6.9% over 17.5km.

Hm, you think. That's not far from Kings Mountain. Googling reveals in short order that, indeed, Kings Mountain averages a just-shy 6.8%.

For about 7km. And without the other 150km of the day of stage 11. And without being bracketed by 20 other stages. Ouch.