Most laps completed in a backyard ultramarathon (female)
- Who
- Sarah Perry
- What
- 95 total number
- Where
- United States
- When
- 22 October 2025
The most laps completed in a backyard ultramarathon (female) is 95, achieved by Sarah Perry (UK) in Bell Buckle, Tennessee, USA, on 18–22 October 2025.
Backyard ultramarathons challenge competitors to complete a lap of 4.167 miles (100 miles divided by 24) every hour until only one runner remains. Maths teacher Sarah Perry broke the women’s record while competing at the Backyard Ultra Individual World Championships in Bell Buckle, completing 95 laps and running 395 miles (635 kilometres).