Guest, 19, posted a time of 1:27.50 on the Super-G course, good enough to win the title by a comfortable 1.46-second margin from Czech Ester Ledecka, with Alexandra Tilley of Britain in third.
And added to her slalom time, she ran out Super-Combined champion, with Tilley's slalom advantage wiped out. Ledecka had to settle for bronze.
In the men's racing France's Roger Brice won the Super-G, ahead of Matteo Marsaglia, with Britain's TJ Baldwin in third.
Cyprien Sarrazin scooped the Super-Combined, despite finishing 12th overall in the Super-G, by virtue of a dominating slalom run.
- Sports & Recreation