World Marathon Challenge

Runbuk, Inc. is the organizer behind some of the most extreme and challenging running events on the planet. For almost two decades, we have been delivering world-class running experiences in the most remote and demanding locations, from the northernmost to the southernmost marathon, the highest desert marathon, and the ultimate World Marathon Challenge.

Our signature event, the World Marathon Challenge, pushes competitors to their limits with seven marathons on seven continents in just seven days. Starting in Antarctica and spanning across Africa, Australia, Asia, Europe, South America, and North America, this ultimate running challenge is a test of both physical and logistical endurance.

In addition to organizing the World's Coolest Marathon and the North Pole Marathon, we also host exclusive clubs, including the 7 Continents Marathon Club, the Intercontinental Marathon Club, and the Marathon Grand Slam Club, recognizing athletes who have accomplished impressive running feats around the globe.

Runbuk is dedicated to helping runners discover the world and push their boundaries in some of the most extreme locations on Earth. Join us in conquering the world's farthest extremes and unleash your full potential as a runner.