Winter triathlon is a multisport event involving the continuous and sequential completion of running, mountain biking, and cross-country skiing, all on snow. Course distances are set on the day of the event to achieve a winning time of around 80–90 minutes, after taking account of the snow conditions.
Since 2013 the International Triathlon Union created a new version of the sport, which consist of 5 km of snowshoeing, 12km of ice skating and 8km of cross-country skiing. It is called winter triathlon S3, because the three sports start with an S (snowshoes, skate, ski). The first ITU event was held in Quebec, Canada in February 2015.
The sport was denied inclusion in the 2014 Winter Olympics in Sochi, Russia.
References
Winter triathlon Wikipedia(Text) CC BY-SA