![Break the two-hour marathon record? It could be done | CU Boulder Today | University of Colorado Boulder Break the two-hour marathon record? It could be done | CU Boulder Today | University of Colorado Boulder](https://www.colorado.edu/today/sites/default/files/styles/hero/public/article-image/boston-marathon-42.jpg?itok=Fjoc-6_8)
Break the two-hour marathon record? It could be done | CU Boulder Today | University of Colorado Boulder
![2017 Chicago Marathon lands world record holder Dennis Kimetto and Tirunesh Dibaba - Canadian Running Magazine 2017 Chicago Marathon lands world record holder Dennis Kimetto and Tirunesh Dibaba - Canadian Running Magazine](https://runningmagazine.ca/wp-content/uploads/2016/09/chicago2013-kimetto-mutai-kitwara-e1502908343727.jpg)
2017 Chicago Marathon lands world record holder Dennis Kimetto and Tirunesh Dibaba - Canadian Running Magazine
![Stream Dennis Kimetto, Male Winner AIMS Best Marathon Runner 2014 by RunBlogRun | Listen online for free on SoundCloud Stream Dennis Kimetto, Male Winner AIMS Best Marathon Runner 2014 by RunBlogRun | Listen online for free on SoundCloud](https://i1.sndcdn.com/artworks-000096734734-fed4bw-t500x500.jpg)
Stream Dennis Kimetto, Male Winner AIMS Best Marathon Runner 2014 by RunBlogRun | Listen online for free on SoundCloud
![Eliud Kipchoge runs fastest ever marathon but doesn't break world record during Nike Breaking2 race | The Independent | The Independent Eliud Kipchoge runs fastest ever marathon but doesn't break world record during Nike Breaking2 race | The Independent | The Independent](https://static.independent.co.uk/s3fs-public/thumbnails/image/2017/05/06/09/eliud-kipchoge.jpg?width=1200)
Eliud Kipchoge runs fastest ever marathon but doesn't break world record during Nike Breaking2 race | The Independent | The Independent
![An Exclusive, Behind-the-Scenes Look at How Nike Is Trying to Break the 2-Hour Marathon Barrier | Runner's World An Exclusive, Behind-the-Scenes Look at How Nike Is Trying to Break the 2-Hour Marathon Barrier | Runner's World](https://hips.hearstapps.com/hmg-prod.s3.amazonaws.com/images/1076/articles/2017/05/moonshot-web-2-1503953086.jpg)