- Who
- Kieran Deegan
- What
- 3:23:53 hour(s):minute(s):second(s)
- Where
- United Kingdom (London)
- When
The fastest marathon dressed as a medical instrument is 3 hrs 23 min 53 sec and was achieved by Kieran Deegan (UK) at the Virgin Money London Marathon, in London, UK, on 3 October 2021.
This record was one of 30 successful world record attempts adjudicated at the 2021 Virgin Money London Marathon.