Mark Bivins's efforts:	From	Age	Date	Finish Time
2018 Golden Gate Dirty 30 (50K)		33	Saturday, June 2, 2018	DNF
2017 Golden Gate Dirty 30 (50K)	Colorado, US	32	Saturday, June 3, 2017	08:35:59.56
Quad Rock 2017	Colorado, US	32	Saturday, May 13, 2017	06:21:22.00
2016 Golden Gate Dirty 30 (50K)		31	Saturday, June 4, 2016	08:19:19.63