William Poromaa is a Swedish cross-country skier and is one of the strongest distance skiers of his generation. The 2023 and 2025 World Championship medal winner impresses with his impressive skiing strength, endurance and tactical flair. In 2025, he celebrated his first World Cup victory over 20 km classic. As part of the Åsarna IK team, he shapes Swedish cross-country skiing with consistency and fighting spirit.