Calum Neff (born 15 August 1984) is Canadian long-distance runner and coach who lives in Katy, Texas. He holds three Guinness World Records for pushing his daughters in 10K, Half Marathon and Marathon distance races.[1][2]
Neff was born in Aberdeen, Scotland to Canadian parents.[3] He competes for Canada in the World Mountain Running Championships and in January 2021, Neff broke the Canadian 50K national record with a time of 2:51:27 in his second try at the record.[4][1][5] Neff is also known for his work as a pacer. He paced Sara Hall in her American record quest at the Marathon Project and Keira D'Amato to her American record and Houston Marathon win in January 2022.[5][6]
Neff won the Ultramarathon 50K Race at the Marine Corps Marathon, North America's largest ultramarathon, in 2023 and 2024. Neff set a course record of 2:55:57 in October 2023.
In December 2023, he won the 50K race at the Dallas Marathon, setting a course record.
Neff is a University of Houston graduate who works as an operations manager and running coach.[4][7]