Caitriona Jennings has broken the world record for 100 miles after running 12 hours, 37 minutes and four seconds to complete the Tunnel Hill 100 Mile, a US ultra-marathon event staged in Illinois. The Donegal athlete was making her debut in a 100-mile race, having already established a series of Irish records over shorter distances. After 80 miles, or about 10 hours of racing, her pace only slightly slowed, and she remained under world record pace the entire way. The Tunnel Hill 100 Mile event consisted of two legs of an out-and-back course, mostly flat, on the Tunnel Hill State Trail, the site of the old train track and tunnel in southern Illinois. When Herron broke the 100-mile world record in 2017, she improved the previous best mark by 63 minutes, and now Jennings has lowered that record again to 12:37:04, with the promise perhaps of faster to come.

Source: The Irish Times November 09, 2025 17:07 UTC