"I'm proud to be in the finals and still be in the hunt considering I was down 200 points only a few weeks ago," Vonn said. "No matter what happens this has been one of the most exciting seasons and I'm really happy with the way I skied."
Vonn covered the course at Lenzerheide in 1 minute, 28.88 seconds. Mancuso turned in a time of 1:27.50 for her first World Cup downhill victory in four seasons.
"I've been working through injuries and working hard for the past four years," said Mancuso. "I'm finally back on the top of the downhill podium and it feels great."
Lara Gut of Switzerland took second with a 1:28.31. Austrian Elisabeth Goergl placed third. Riesch was a disappointing 17th.
Interpol investigating stolen passports on missing flight
Susan Sarandon 'very excited' about daughter's pregnancy