The world’s toughest challenge – Sweden 2023
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The world’s toughest challenge
The race distance is about 250 km, a distance of 6 marathons, split up into approximately 200 km running and 50 km swimming. Running takes place on all types of terrain, rocks, cliffs, gravel roads, paths but mostly unpaved and difficult terrain. Swimming is in open sea and can often feature strong winds, currents and waves.