Tarjei Bø is a Norwegian professional biathlete. Awarded Olympic gold medals, World Championship gold medals and World Cup victories from 2010 to 2022. Bø debuted in the Biathlon World Cup on 26 March 2009 in Khanty-Mansiysk, Russia. In the 2010 Winter Olympics, he earned his first gold medal in the 4 × 7.5 km biathlon relay. On 10 December 2010 he won the World Cup sprint race in Hochfilzen, his first world cup victory. He also won the following pursuit race and anchored the winning relay team. Bø is the older brother of biathlete Johannes Thingnes Bø.

The Biathlon World Cup is a top-level biathlon season-long competition series. It has been held since the winter seasons of 1977–78 for men and 1982–83 for women. The women's seasons until 1986–87 season were called the European Cup, although participation was not restricted to Europeans.