Det Norske Fjellmaraton is a mountain marathon in Beitostølen that will be held for the 46th time in June 2027; in 2026 more than 2,500 people started, and the half marathon had to be capped due to record demand. Besides the marathon and half there are shorter races for all ages and an untimed walking distance. The course climbs from the resort of Beitostølen onto the high Valdresflye plateau, with about 500 m of height difference, open tundra, lingering snow patches and views of the Jotunheimen peaks. The early mountain summer, fresh air and family atmosphere make it a true mountain festival. Beitostølen is a gateway to Jotunheimen, with trails to Besseggen, Lake Gjende, summer hiking and fishing, and cross-country skiing in winter.