The Baikal Ice Marathon in Siberia attracted runners from more than 50 countries.
UKRunChat</a> my view for 26 miles for the lake Baikal marathon in Siberia. Awesom experience. <a href="https://t.co/DjIspNXKFY">pic.twitter.com/DjIspNXKFY</a></p>— aligfred (aligfred) March 6, 2016
The competitors are hardy souls braving a psychologically and physically demanding race.
Lake Bikal pic.twitter.com/0KYOVAPnNw— Nate Nichols (@NathanA5t) March 3, 2016
As well as the freezing conditions the featureless landscape gives little or no sense of perspective to competitors, offering them nothing to focus on but how far they are from the finish.
何撮ってるか分からないほど寒い場所で撮影。I took some Baikal Ice Marathon's photos. pic.twitter.com/9wEkgPgalf— 小泉忠之Tadayuki KOIZUMI (@TadaKOIZUMI) March 6, 2016
The Baikal Ice Marathon is one of the most extreme racing competitions on the planet.