![Planica, Slovenia. 19th Sep, 2015. Competitors run up the ski flying hill during the 3rd Red Bull 400 race in Planica, Slovenia, Sept. 19, 2015. Four-hundred and twenty-five men and women raced Planica, Slovenia. 19th Sep, 2015. Competitors run up the ski flying hill during the 3rd Red Bull 400 race in Planica, Slovenia, Sept. 19, 2015. Four-hundred and twenty-five men and women raced](https://c8.alamy.com/comp/F2J8WN/planica-slovenia-19th-sep-2015-competitors-run-up-the-ski-flying-hill-F2J8WN.jpg)
Planica, Slovenia. 19th Sep, 2015. Competitors run up the ski flying hill during the 3rd Red Bull 400 race in Planica, Slovenia, Sept. 19, 2015. Four-hundred and twenty-five men and women raced
![Participants compete during the Red Bull 400 race in Harrachov, Czech Republic, August 12, 2017, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201708120287401 | agefotostock Participants compete during the Red Bull 400 race in Harrachov, Czech Republic, August 12, 2017, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201708120287401 | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/d460b25b5abbbde75b3b2baaf5a444c5/ckp-p201708120287401.jpg)
Participants compete during the Red Bull 400 race in Harrachov, Czech Republic, August 12, 2017, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201708120287401 | agefotostock
![Ironwood, USA. 12th May, 2018. A contestant celebrates her finish at the Red Bull 400 hill climb at Copper Peak, MI., on Saturday, May 12, 2018. Red Bull describes as the toughest Ironwood, USA. 12th May, 2018. A contestant celebrates her finish at the Red Bull 400 hill climb at Copper Peak, MI., on Saturday, May 12, 2018. Red Bull describes as the toughest](https://c8.alamy.com/comp/MMT6AG/ironwood-usa-12th-may-2018-a-contestant-celebrates-her-finish-at-the-red-bull-400-hill-climb-at-copper-peak-mi-on-saturday-may-12-2018-red-bull-describes-as-the-toughest-foot-race-in-the-world-credit-dean-achesonalamy-live-news-MMT6AG.jpg)