Fastest time to run a marathon distance on seven continents and swim a staged marathon in classical seven seas

The fastest time to run a marathon distance on seven continents and swim a staged marathon in classical seven seas is 633 days and was achieved by Louis Alexander (UK), as verified on 19 July 2024.

Louis wanted to attempt a global challenge for a global cause. In support of the fight against dementia and raising funds and awareness for Alzheimer’s Research UK. He completed a marathon distance of 42.2 km on each of the seven continents and swam a distance of 10 km in each of the seven seas in an accumulated 633 days.