Botn made his international debut relatively late in November 2021, securing the 32nd position in the
IBU Cup sprint in
Idre. Following another appearance in January, he was subsequently excluded from the squad. During the winter of 2022–23, the Norwegian participated in the initial races in early December, achieving his first top-10 result with an 8th place in the individual competition. Due to
Erlend Bjøntegaard's decision to waive his starting rights, Botn received the reserve starting position for the season finale in
Canmore and secured podium finishes in both sprint races. His standout performance, however, occurred in the final race of the season, the pursuit competition, where he claimed his first IBU Cup victory with a lead of over a minute over
Vebjørn Sørum. At the Norwegian Championships, Botn, alongside Håvard Bogetveit, Simon Kirkeeide, and
Johannes Thingnes Bø, won the bronze medal in the relay event for Sogn og Fjordane. For the 2023–24 season, he was selected for the B-national team for the first time. At the
2024 European Biathlon Championship, he won one gold and two silver medals. On 10 February 2026, Botn won the gold medal for
men’s 20km individual biathlon at the 2026 Winter Olympics, finishing with a time of 51:31.5. == Personal life ==