As a child, Stefan accompanied his parents on their mountain adventures and discovered his passion for nature and its challenges at an early age. Then his ambition kicked in. On 5 June 1985, then 20 years old, he won first place in his first official competition; winning the prestigious Rock Master title in Arco only two years later. Stefan remained at the top of his field, wining the title in Arco in 1988 and 1992 as well as the demonstration competition at the Winter Olympic Games in Albertville in 1992. He then decided it was time to tackle real challenges. In 1993 he declared his competition career over and departed in search of greater adventures.