Fastest marathon run by mother and daughter (IS1)

- Who
- Katie Crowhurst, Lucette Crowhurst
- What
- 08:17:54 hour(s):minute(s):second(s)
- Where
- United Kingdom (London)
- When
- 27 April 2025
Age Restriction: Applications for this record title will only be accepted if the applicant is 16 years of age or over.
The fastest marathon run by mother and daughter (IS1) is 8 hr 17 min 54 sec and was achieved by Lucette Crowhurst and Katie Crowhurst (both UK) at the TCS London Marathon in London, UK, on 27 April 2025.
This was one of 42 Guinness World Records titles achieved during the 2025 event.
IS1 is a visual impairment classification. The record is taken as the runners' aggregate time.