- Len Granger, Jamie Barnett
- 38 hr 0 min 27 sec hour(s):minute(s):second(s)
- United Kingdom (Barnt Green)
The longest marathon playing squash (singles) is 38 hr 0 min 27 sec and was achieved by Len Granger and Jamie Barnett (both UK), at Barnt Green Sports Club in Barnt Green, Worcestershire, UK, between 4 and 5 September 2015.
The attempt raised approximately £5,000 for the charities St. Paul’s Hostel and Hospice UK.