David Riefenberg's efforts:	From	Age	Date	Finish Time
The Bear 100 2015	Texas, US	53	Friday, September 25, 2015	34:10:00.00
The Bear 100 2014	Texas, US	52	Friday, September 26, 2014	DNF
The Bear 100 2010	Texas, US	48	Friday, September 24, 2010	33:37:00.00