- Who
- Megan Cassidy
- What
- 3:58:46 hour(s):minute(s):second(s)
- Where
- United States (Newport)
- When
The fastest marathon dressed as a sailor (female) is 3 hr 58 min 46 sec and was achieved by Megan Cassidy (USA), in Newport, Rhode Island, USA, on 8 October 2023.
Megan took on this record attempt as a personal challenge.