Here we go again! Welcome to challenge yourself in
NUTS KARHUNKIERROS
22.–23.5.2026
Karhunkierros is almost full.
One more chance – the 13 km start is still open.
Registration for the 34–166 km distances has closed.
NUTS Karhunkierros – May 22–23, 2026
Registration opens October 14!
What
NUTS Karhunkierros
Finland’s largest trail running event, offering an unforgettable running experience in the stunning landscapes of Oulanka National Park. Various distances: 34 km, 55 km, 83 km, and 166 km. The event is suitable for beginners and experienced ultrarunners alike.
Where
Oulanka National Park
The finish area is located in the heart of Ruka village. The routes traverse the breathtaking scenery of Oulanka National Park, offering diverse and challenging trails.
When
May 22-23, 2026
Secure your spot at Nuts Karhunkierros – Register now!
27.5.2025 at 8:29
NUTS Karhunkierros set a new participation record with 3,412 runners in muddy trail conditions. Eevi Bengs made history by winning the overall 166K race and smashing the course record by over an hour.
Artikkeli Mud, Records, and Glory – Historic Weekend at Karhunkierros 2025 julkaistiin ensimmäisen kerran NUTS Trail Running.
11.5.2025 at 15:59
This spring, it’s not just cowbells ringing at Oulanka – construction work is ongoing at the research station, and there will be no parking available near the Oulanka start area on Friday. 🏁 This primarily affects runners in the 55 km distance, whose start is located near the Oulanka Visitor Centre. Parking has always been…
Artikkeli Oulanka parking relocated to Käylä – free shuttle on Friday 4–8 PM julkaistiin ensimmäisen kerran NUTS Trail Running.
10.5.2025 at 6:11
Salty, sweet, hot, and cold – long trails deserve great treats. From crunchy chips and smooth chocolate to warm soups and refreshing Crisp Radlers, here’s everything you’ll find at the aid stations and finish area of NUTS Karhunkierros 2025. Plan your favorites in advance!
Artikkeli What’s on the Table at NUTS Karhunkierros 2025 Aid Stations and the Finish Line? julkaistiin ensimmäisen kerran NUTS Trail Running.
Distances & Routes
13 km 🔥 Entries open
A fast and scenic 13 km trail in the Ruka fell area! Steep climbs, thrilling descents, and breathtaking views – perfect for all levels. Minimum age: 12 years.166 km
From Ruka to the Arctic Circle and back! 166 km on the legendary Karhunkierros trail offers fell summits, deep wilderness, and the ultimate ultra challenge – twice!83 km
From the Arctic Circle to Ruka! 83 km on the Karhunkierros trail takes you from Hautajärvi through deep forests, river gorges, and towering fells to the finish in Ruka.
OFFICIAL PARTNER
Ylämäkialamäki & Dynafit serves as the official partner of our events – they provide amazing main trip prizes and equip you with the best possible gear for trail running
OFFICIAL ENERGY PARTNER
Nosht continues as the official energy partner of NUTS in 2026 – together with Jollos, they keep you moving from start to finish. At the aid stations, you’ll get high-quality energy to help you stay strong on the trails and ensure your legs carry you powerfully all the way to the finish line.
