After winning the World Cup overall title in 1978, Wenzel's best year came in 1980. At the 1980 Winter Olympics in Lake Placid, she won gold medals in the slalom and giant slalom, and just missed out on a sweep by taking the silver in the downhill at Whiteface Mountain. She also easily won the world championship gold medal in the combined event, its final edition as a "paper race" and her fourth world championship medal in that event. At the same Olympics, her brother also won a silver medal, placing Liechtenstein high in the medal ranking of the games. In addition to her Olympic success, she won nine World Cup races in 1980 and captured the overall, giant slalom, and combined season titles, and brother Andreas won the men's overall for a Wenzel family sweep of the overall titles. Her daughter Tina Weirather won a bronze medal in Super-G for Liechtenstein at the 2018 Winter Olympics in PyeongChang.