Tornimäki VERTTITONNI is a vertical-kilometer race held on the Tornimäki slopes in Mikkeli, organized by Haukivuoren kisailijat. Participants begin together below the slopes in the early evening. The format involves ascending the ski lift line, descending the banana slope, and repeating this cycle until the full vertical distance is achieved. Poles are prohibited, making it a running challenge focused on uphill and downhill effort rather than a ski-style ascent.
The complete race totals 1,000 meters of climbing over 19 laps, covering approximately 10.5 kilometers. Separate categories exist for women and men, with awards for the top finishers in each. The entry fee is modest, but participants must be self-sufficient, managing their own support and insurance. Parking is located before the slope area, not directly at the Tornimäki slopes.