Arizona's State Bicycle Company has a video series called "Riding Fixed, Up Mountains, With Pros". And apparently, this is episode 17! Man, I didn't even know these existed. If you have an extra 30 minutes, it's worth the watch. Keegan starts the climb at 5515′ and climbs 3204′ over 24 miles on a fixed-gear bike, smashing a 48tx19t! And there is a surprise at the end...