Sarah Webster has rapidly become one of the world’s leading road ultrarunners, combining exceptional speed with remarkable endurance across the 100 km and 24‑hour disciplines. She made her ultramarathon debut at the 2023 Anglo Celtic Plate 100K, immediately establishing herself as a major talent on the international stage and setting a new British record of 7:03:40.
In 2025, Webster delivered the defining performance of her career, winning the IAU 24‑Hour World Championshipsand setting a new IAU 24‑Hour World Record with an extraordinary distance of 278.621 km. This achievement, together with her consistent excellence over 100 km, earned her the title of IAU Athlete of the Year 2025.
Personal Bests
- 24 Hours: 278.621 km
- 100 km: 7:03:40
- 50 km: 3:20:07
Career Highlights
- IAU 24‑Hour World Record Holder -278.621 km (2025),
- IAU 24‑Hour World Champion (2025)
- IAU Athlete of the Year (2025
- IAU 100Km European Record -7:03:49
- British 100 km Record Holder
- Ultra Debut at the 2023 Anglo Celtic Plate 100K
Announced herself as a world‑class ultrarunner with a commanding first‑time performance
Sarah Webster continues to be a defining figure in global ultrarunning, recognised for her disciplined pacing, mental resilience, and ability to perform at the highest level across multiple ultra disciplines. She has achieved podium finishes at the IAU 50K World Championships, IAU 100K World Championships, and IAU 24‑Hour World Championships — an exceptional record for any athlete, made even more impressive by the fact that she is only four years into her ultrarunning career.
John O'regan
IAU Director of Communications
