Audrey McManiman of St-Ambroise-de-Kildare, Que., finished first in the women's snowboard slopestyle event Thursday, while Ancaster, Ont., native Michael Ciccarelli took top spot in the men's competition.
The victories came on Day 7 of competition at the inaugural event, which wraps up Sunday.
McManiman, 16, finished first with a best-run score of 84.25.
"I can't believe it," she said. "I don't think it will hit me until I am home."
American Arielle Gold won silver and Alexandra Fitch of Australia took the bronze.
Ciccarelli, 15, was fourth in the halfpipe competition earlier in the week. His total of 94.25 was four points ahead of American Ben Ferguson.
"I didn't think it would happen," Ciccarelli said. "When I landed (my last jump), I thought 'Wow, is that real?’"
David Habluetzel of Switzerland took the bronze. Tyler Nicholson of North Bay, Ont., was sixth.
Quincy Korte-King of Ottawa was seventh in the women's event.
Canada won its first medal of the Games on Wednesday. Thomas Scoffin of Whitehorse earned a bronze in mixed curling with a 6-4 win over Sweden's Rasmus Wrana.