Ineos 1:59 Challenge

The Ineos 1:59 Challenge, held on 12 October 2019, was an attempt by Kenyan athlete Eliud Kipchoge to break the two-hour mark for running the marathon distance, which he achieved in a time of 1:59:40.2. The event was specifically created for Kipchoge and held in Vienna, Austria to help market the Nike ZoomX Vaporfly 4%.^[1] Kipchoge had previously attempted to run a two hour marathon at the Breaking2 event organised by Nike in 2017, but he fell short by 25 seconds. He then went on to run a world record marathon at the 2018 Berlin Marathon before British chemicals company Ineos announced the attempt in May 2019. 41 pacemakers, rotating in and out in groups of 7, assisted Kipchoge throughout the attempt.

Due to the presence of the pacemakers, delivery of hydration by bicycle, and the lack of open competition, the achievement was not eligible to be ratified as a marathon world record, and is not recognized as such by World Athletics.