Background
Olsen was born in Amherst, Wisconsin.
Olsen was born in Amherst, Wisconsin.
In 2009, Olson ran his first fifty kilometer race and came in sixth. In 2011 he first attempted the Western States 100. The route goes from Squaw Valley to Auburn, California and attracts an international field and he completed the course in 16 hours 18 minutes to finish sixth.
He has won the Western States 100 and holds the Western States course record of 14 hours, 46 minutes and 44 seconds. The following year, he won his first one hundred mile race. In 2012, Olson won the 39th annual Western States 100 race in the record time of 14:46:44, trimming the course record of 15:07:04, set by Geoff Roes two years earlier, by over twenty minutes. He won the race again in 2013, and also competed in the Ultra-Trail du Mont-Blanc, where he came fourth with a time of 21:38:23. In 2014, Olson won the "Male Runner of the Year" award at the Endurance Live sports awards organised by the Competitor Group, Incorporated.