Who is Conner Mantz
The short answer
Conner Mantz, born in 1996 in Utah, is an American marathoner. He won the 2024 US Olympic Marathon Trials, finished eighth at the Paris Olympics, and ran 2:04:43 in Chicago in 2025, breaking Khalid Khannouchi's American record of 2:05:38 that had stood for 23 years. He is coached by Ed Eyestone.
Mantz won two NCAA cross-country titles at BYU, where Eyestone, himself a two-time Olympic marathoner, was his coach. He stayed with Eyestone as a professional. In 2026 two sacral stress fractures kept him out of the Boston Marathon. He came back in the summer and ran 60:08 at the World Half Marathon Championships in September 2026.
How he trains
- High mileage. Marathon builds have been reported well above 100 miles, about 160 km, a week, most of it easy.
- Long, specific workouts. Eyestone's sessions are long runs with blocks at marathon pace and slightly faster, plus long tempo runs.
- Threshold as the backbone. Regular threshold work, at the effort of a strong one-hour race.
- Patience. He moved up to the marathon gradually after years on the track and in cross-country.
