Rich narrowly missed out on qualifying for the six-woman final by two places, giving her a final ranking of eighth.
The result marks her second top-10 performance of the season at the World Cup level, following a seventh place result in Cardona, New Zealand, back in August 2015.
Current Olympic Champion Jamie Anderson of the USA took victory, with her American team-mate Karly Shorr in second. New Zealand's Christy Prior was third.
In the men's slopestyle event, Angus Waddington finished in 26th place.
Unfortunately OWIA/NSWIS Slopestyle Skier Russ Henshaw was unable to compete at the Olympic test event after suffering a season ending broken collarbone injury just prior to Korea.
IMAGE: Jess Rich (right) and Christy Prior at the PyeongChang, Korea © Jess Rich Instagram