[3] Eckhoff competed in Biathlon at the 2014 Winter Olympics in Sochi, where she won 3 medals.

[6] She is the sister of former biathlete Stian Eckhoff and studied engineering at the Norwegian Institute of Technology.

[3][7] In 2016, she became World Champion on 7.5  km sprint in her home arena, Holmenkollen, in Norway.

In the 19–20 season, she won seven World Cup races, but she finished second in the Overall, behind Dorothea Wierer.

[8] Eckhoff did not participate in the 2022–23 Biathlon World Cup due to health issues.