Right, I don't pretend to be as fast as those elites but I came up with 4-5h as I compared to my close 14er here in the Rockies : Long's peak.
The trip is about 16 miles, +-4,500 ft and it took me the first time I did it when I was living at sea level about 5 hours round trip.
Long's Peak Trip Report Now my estimate could definitely be wrong as I've never taken the trail and as it depends on the conditions etc....
My point was that I'm not planning on spending the whole day up there.
But given the recommendations, I'm now highly considering Mt Langley.