Nøsen Hundreds is a mountain running series held in June in Valdres, Norway, offering three distances: 100 km, 50 km, and 21 km. The 100 km race, the longest option, serves as a UTMB 100K M qualifier and awards 4 ITRA points. The 50 km race is a UTMB 50K M qualifier with 2 ITRA points. The 21 km race provides a shorter mountain course and is a UTMB 20K M qualifier.
The races traverse the mountain terrain between Valdres and Hemsedal, utilizing rugged trails instead of paved roads. The event's organizers describe the course as a journey through time, evoking the experience of crossing ancient mountain landscapes. The sold-out 50 km race indicates a strong interest in the middle distance among runners seeking a challenging mountain run that is less demanding than the 100 km option.