On Athletics Club

On Athletics Club (OAC) is a training group of professional distance runners sponsored by On. The team is coached by Dathan Ritzenhein and was founded in August 2020 with eight original members. OAC trains primarily out of Boulder, Colorado. On also sponsors sister clubs "OAC Europe" coached by Thomas Dreissigacker and "OAC Oceania" coached by Craig Mottram. In July 2023, Kelsey Quinn was announced as assistant coach for the team.

Non-championship accomplishments
Colorado's First Sub-Four Minute Mile

On August 3, 2020, Joe Klecker and Olli Hoare became the first people to ever break 4 minutes in the mile on Colorado soil. The long streak of no sub-4-minute miles is attributed to the elevation of the state. Hellen Obiri Marathon Success

In the 2023 Boston Marathon, Obiri won the race in a time of 2:21:38. She then won the 2023 New York City Marathon in 2:27:23, becoming the first woman since 1989 to win both races in the same year.

At the 2024 Boston Marathon, Obiri won her second straight Boston marathon beating second place finisher, Sharon Lokedi, by eight seconds in a time of 2:22:37.

Men

 * Geordie Beamish 🇳🇿 (August 2020)
 * Olli Hoare 🇦🇺 (August 2020)
 * Joe Klecker 🇺🇸 (August 2020)
 * Morgan McDonald 🇦🇺 (June 2021)
 * Yared Nuguse 🇺🇸 (June 2022)
 * Jonas Raess 🇨🇭 (June 2022)
 * Mario García 🇪🇸 (June 2022)
 * Ky Robinson 🇦🇺 (June 2024)

Women

 * Sage Hurta-Klecker 🇺🇸 (June 2021)
 * Alicia Monson 🇺🇸 (August 2020)
 * Josette Andrews 🇺🇸 (January 2023)
 * Hellen Obiri 🇰🇪 (January 2022)
 * Sintayehu Vissa 🇮🇹 (August 2022)
 * Maia Ramsden 🇳🇿 (June 2024)
 * Olivia Markezich 🇺🇸 (June 2024)

Former members

 * Alicja Konieczek 🇵🇱 (August 2020 - October 2022)
 * Emily Oren 🇺🇸 (August 2020 - November 2021)
 * Carlos Villarreal 🇲🇽 (August 2020 - May 2022)
 * Leah Falland 🇺🇸 (August 2020 - October 2022)
 * Carmela Cardama Báez 🇪🇸 (June 2021 - March 2024)