Eilertsen has been taking part in the Ticket to Ride World Snowboard Tour and FIS competitions since 2013 . In the 2013/14 season, she won second place in slopestyle at the Burton European Junior Open in Laax and first place at the Trentino Rookie Fest in Monte Bondone . In March 2015 she became the Norwegian Junior Big Air Champion . At the 2016 Winter Youth Olympic Games in Lillehammer , she came 16th in slopestyle. In March 2016 she won Big Air at the Norwegian Junior Championships and in Slopestyle at the Norwegian Championships. In the same month, she took 20th place in slopestyle at the 2016 Snowboard World Championships in Yabuli . In the 2016/17 season she won the Slopestyle at the Pleasure Jam in Schladming and the Norgescup Slopestyle in Vierli . She also took third place in slopestyle at the Spring Battle in Flachauwinkl and ninth place in slopestyle at the 2017 Snowboard World Championships in Sierra Nevada . She made her debut in the Snowboard World Cup in January 2017 on the Alpe di Siusi , which she finished in 27th place in slopestyle. At the end of March 2017 she became Norwegian junior champion in slopestyle. In the 2019/20 season she came with four top ten placements, 18th place in the Freestyle World Cup and fourth place in the Slopestyle World Cup.
Norway
World cup
TTR World Snowboard Tour