Craig Lloyd posted this challenge in the Uinta Mountains:
The Utah Triple Crown was first coined in 2001 when I did a one day ascent of all three of Utah's tallest peaks in a day, starting from an advanced base camp at Dollar Lake. The three peaks are King's Peak, South King's, and Gilbert Peak; in that order. The trip was covered by a local paper and over time has received a bit of attention by local peakbaggers. I never considered what I did a FA and I know of at least two other people who have come forward and said they had done it before me.
In 2008 I was again in the Uinta's hiking King's Peak in a day and checked the trail registry at the bottom to see how many other people had done it in a day that year. I was shocked to see that Davy Crockett had made an attempt at the Triple Crown, car to car. As far as I know his was the first round trip done car to car in a time of 14:34:59 (about 37 miles). His report can be read at www.crockettclan.org/blog/?p=120#more-120.
I have heard of one other person doing this and it was accomplished in under 14 hours.