The 28-year-old beat Russia's Andrey Sobolev in the final for what is his third career World Cup win.

Mastnak also won this season's opening race and took silver at the World Championships in Park City in early February.

Third place in Secret Garden went to Stefan Baumeister from Germany.

Another Slovenian, Žan Košir, was eliminated in the round of 16 after winning the World Cup parallel giant slalom race in Pyeongchang, South Korea, a week ago.