Isaiah Janzen bettered List's unsupported time by over 2 hours on Sept. 14-15, 2010. Janzen's light failed during the run, but he continued by the light of his iPhone until finding a tarp by a patrol cabin, which allowed him enough warmth to sleep for a few hours. Some might view use of the tarp as a violation of the "rules" for a purely unsupported trip, but one does what one needs to do to survive. Janzen's full TR is here.
1d 7h 30m 38s