- Hilary Wharam
- 78:00 year(s):day(s)
- United Kingdom (Preston)
The oldest person to complete 10 marathons in 10 days (female) is 78 years 0 days and was achieved by Hilary Wharam (UK, b. 4 August 1941) in Preston, UK, on 4 August 2019.
Hilary attempted this record at the Schorcher 10 in 10 event.