John Witkiewicz's efforts:	From	Finish Time
Quad Rock (2019) (Quad Rock 25)	Colorado, US	05:56:51
Quad Rock (2018) (Quad Rock 50)	Colorado, US	12:30:54
Blue Sky Trail Marathon (2017)	CO	04:46:58
Quad Rock 2017	Colorado, US	06:19:11
Never Summer 100k 2015	CO	20:48:04