ELFSTEDENTRIATHLON
From Openwaterpedia
The ELFSTEDENTRIATHLON (or Eleven Cities Triathlon) is a charity event by 2008 Olympic 10K Marathon Swim gold medalist Maarten van der Weijden of the Netherlands where he will attempt to swim 200 km, cycle 200 km and run 200 km non-stop to raise money for former, current, and future cancer patients in June 2023. It is organized by the Maarten van der Weijden Foundation.
