It took them 10 hours to reach Trail Crest after summiting? That's 2.5 miles from the summit!?
I assume the rain complicated matters for all of them, but 2pm is plenty of daylight and given the sun does not set around 8pm that 6 hours of good daylight.
Could also be that the rain clouds hovered at 13000 feet which will resemble pea soup fog for us sea level devils. That could disorient any hiker up there. One wrong turn and...
Bad case of AMS.
