Benjaminsen represented Norway at the 2017 World Orienteering Championships in Tartu, Estonia, where her best result was ninth place in the long distance. In ski orienteering, she won a bronze medal at the 2013 and 2015 Junior World Championships. At the 2021 European Orienteering Championships she won a bronze medal in the Knock-out sprint, and a bronze medal in the Sprint relay with the Norwegian team.