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Caitriona Jennings broke the women’s 100-mile world record at the 2025 Tunnel Hill 100 in Illinois.
Irish ultrarunner Caitriona Jennings broke the women’s 100-mile world record at the 2025 Tunnel Hill 100 in Illinois, finishing in 12:37:04 on her debut at the distance.
The 45-year-old, a former Olympic marathoner, averaged 7:34 per mile and placed fourth overall.
Her time surpassed Camille Herron’s 2017 record of 12:42:40.
On the same day, American Anne Flower set a new women’s 50-mile world record in 5:18:57, and Courtney Olsen set a new American 100K record.
Multiple records were set across distances at the event, which is pending official recognition.
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Caitriona Jennings rompió el récord mundial femenino de 100 millas en el 2025 Tunnel Hill 100 en Illinois.