Check out this video from the Toughest race series promoting their Toughest ICE event slated for April 2015 (in Sweden).
From their website
An extreme race in an extreme environment!
Toughest ICE is a once-in-a-lifetime event for those seeking the next level challenge. Together with the internationally renown Swedish ICEHOTEL Toughest is building the worlds first obstacle course made of snow and ice. The race takes place at Jukkasjärvi with the ICEHOTEL as prime location. ICEOTEL will be rebuilt to an obstacle course and the surroundings of Jukkasjärvi and Torne älv makes up the rest of the 8 km course.
See what I did there?