- Collin Harrison
- 5:03:51 hour(s):minute(s):second(s)
- United Kingdom ( Edinburgh)
The fastest marathon carrying a 100 lb pack is 5 hr 3 min 51 sec and was achieved by Collin Harrison (UK) in Edinburgh, Lothian, UK, on 29 May 2022.
Collin made this Guinness World Records attempt to prove that age is just a number.