In 2021 Lundberg won a gold medal in the middle distance at the Junior World Orienteering Championships in Turkey,[4] as well as being part of the Swedish winning team in the relay, where she ran the last leg,[5] and winning a silver medal in sprint, five seconds behind the winner.[6]
In 2022 Lundberg won three gold medals. In the middle distance,[7] in the relay, where she ran the third leg in the Swedish winning team,[8] and in the long distance [9]
Competing at the 2021 European Orienteering Championships, she placed 8th in the sprint,[10] and reached the semifinal in the knockout sprint.[11]
At her first participation in the World Orienteering Championships 2023 she won a bronze medal in the middle distance,[12] and a gold medal in the relay as start runner for the Swedish winning team.[13]
At the European Orienteering Championships in Belgium in August 2025, Lundberg won a bronze medal in the mixed sprint relay with the Swedish team.[14] She later won a silver medal in individual sprint at the same championships, in Lier, three seconds behind Pia Young Vik.[15][16][17]
In ski orienteering, Lundberg won three gold medals at the 2021 Junior World Ski Orienteering Championships, in sprint,[18] long and middle distances, in addition to a silver medal in the relay.[2][19]
