A Unique Endurance Adventure in the Heart of Finland’s Lake District
Welcome to an unforgettable SwimRun experience in the national landscape of Oulujärvi.
Ärjä Arctic SwimRun combines trail running and open-water swimming in the breathtaking Ärjänsaari, located in Kajaani—a place where pristine nature, history, and the joy of movement come together.
The event will be held for the first time in summer 2026, following strong interest from athletes. The island’s shallow sandy beaches, crystal-clear waters, and varied forest trails create a safe yet truly immersive environment for both experienced SwimRun athletes and first-timers.
What Is Ärjä Arctic SwimRun?
Total distance: approximately 10 km
Open-water swimming: approx. 4 km
Trail running: approx. 6 km
4 swimming sections and 4 running sections
Start and finish at Vierasniemi, Ärjänsaari
The course follows the island’s most scenic trails and the open waters of Oulujärvi
Why Participate?
Experience a rare SwimRun event in Northern Finland
Move through a landscape that is becoming a protected natural area
Boost both physical and mental well-being
Spend a summer Saturday in a supportive, community-driven atmosphere
Discover Ärjänsaari – “a natural treasure belonging to every Finn”
Who Is the Event For?
Ärjä Arctic SwimRun is designed for anyone interested in trail running and open-water swimming. The clearly marked course and safe swimming sections make the event accessible even for first-time SwimRun participants.
You can take part solo or with friends—whether you’re coming from nearby or farther away. We warmly welcome international athletes as well.
Getting There
Kajaani is easily accessible by train, plane, or coach. It takes by car about 20min from city center to Ruunaniemi (Ruunaniementie 70, Kajaani) Harbour which is starting point for boat transfer to Ärjänsaari.
The boat transfer to the island takes approximately 10 minutes (4 km)—and the journey itself is already part of the adventure.
A Sustainably Delivered Experience
Ärjä Arctic SwimRun is organized with social and ecological sustainability at its core, respecting both nature and the cultural history of the area. The event aims to leave a lasting impression on participants—without leaving a footprint on the environment.
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