100 miles, women

What to remember

In February 2026, at the Jackpot 100 Mile, Ashley Paulson ran 100 miles in 12 h 19 min 34 s, the fastest time by a woman over that distance at the 2026 race.

An ultramarathon is any footrace longer than the traditional marathon distance of 42.195 kilometres. Distances, surfaces and formats vary widely. The shortest common ultra is 31 miles (50 km), while 100 miles (160 km) is typically the longest course distance raced in under 24 hours. Beyond that come multi-day races, often held over 48 hours, 200 miles or more, sometimes in stages with breaks for sleep.

Ashley Paulson's time was set over that 100-mile distance, typically the longest raced in under 24 hours. The oldest and largest ultramarathons, such as the Comrades Marathon and the Two Oceans Marathon, are held on roads.