This is the couple that is climbing all of the “50 Classic Climbs of North America” and their climb of Devils Tower this last August.
They tell the complete story of their climb here. Including one group that took 18.5 hours to climb it.
“The Durrance Route is, in my opinion, the easiest route of the fifty.It took us a mere three hours round trip, and was a great break to the loose rock and chilly weather in the Canadian Rockies. There were two other parties on the route when we rolled up to the base at 11:30AM. The Rangers told us that the first group started at 6AM that morning, and in 6.5 hours had made it up only two pitches, and they were working on the third pitch! The other party was on pitch two and had been at it for 4 hours.”