Ärjä Arctic Swim-Run

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.

• 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

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.