Zach Miller is a professional American ultramarathon runner.
Born in Kenya to missionary parents, Miller was primarily raised in Lancaster County, Pennsylvania. He ran track, cross country, and played soccer in high school. He continued to run at Rochester Institute of Technology while studying electrical engineering.
After college Miller worked in the print shop on the Queen Mary 2 cruise ship, and trained for running on a treadmill, the ship's stairwells, and at ports of call. After his win of the JFK 50 Mile in 2013 with the third fastest time in course history, he turned pro while continuing his cruise ship work. In 2015, his win of Ultra-Trail du Mont-Blanc's Courmayeur-Champex-Chamonix (CCC) was the first American win of that race.
After his cruise work Miller was the resident caretaker at Barr Camp near Manitou Springs, Colorado for five years, which provided the opportunity to live and train at altitude on the Barr Trail and nearby Pikes Peak. After Barr Camp, Miller's primary residence became a converted school bus.
After a three-year break to recover from Haglund's syndrome, Miller returned to racing in 2023. He became one of only a few American men to podium at the Ultra-Trail du Mont-Blanc 105 mile race, after coming in second to overall winner Jim Walmsley.
Notable race results Miller has won or had a top three finish at a number of the most competitive ultramarathons in the world. 2023 Ultra-Trail du Mont-Blanc Switzerland, Italy, France 2nd 100 mile 2023 Tarawera Ultramarathon New Zealand 1st 100 mile 2022 Trail 100 Andorra Andorra 1st 105k 2018 JFK 50 Maryland, USA 2nd 50 mile 2017 The North Face Endurance Challenge Marin County, California 1st 50 mile 2016 The North Face Endurance Challenge Marin County, California 1st 50 mile 2016 Madeira Island Ultra Trail Madeira Island 1st 100 mile 2015 The North Face Endurance Challenge Marin County, California 1st 50 mile 2015 Ultra-Trail du Mont-Blanc CCC Italy, France, Switzerland 1st 100k 2014 Lake Sonoma California 1st 50 mile 2013 JFK 50 Maryland, USA 1st 50 mile
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