Swiss Patrizia Kummer won the women's snowboard parallel giant slalom.
Kummer, 26, secured gold after Japan's Tomoka Takeuchi fell over halfway through the second run of the final.
Takeuchi, whose opponents had fallen over in the quarter and semi-finals, finished 7.32 seconds behind to take silver in her fourth Games.
Russian Alena Zavarzina beat Austria's Ina Meschik in the small final to take bronze, moments before her husband Vic Wild won gold in the men's final.
In the parallel giant slalom, riders complete a blue and a red run, racing each other as well as the clock.