Pristine waters and majestic mountains The majestic Alps - reflected in the pristine waters of Lake Thun - welcomes athletes to Thun, the new home of IRONMAN Switzerland. This race took place in Zurich for 23 years before moving to its new home, a celebration of the Swiss mountain culture and landscape. Spot the three famous peaks Eiger, Mönch & Jungfrau right from the event site and marvel at the beauty of this otherworldly landscape.