Rowan Cheshire (22), has qualified for the final of the women's ski halfpipe, posting a best score of 74.00 from her opening run for ninth place.
The result comes four years after she was ruled out of her planned Olympic debut in Sochi after suffering a heavy fall in training.
"It feels amazing to reach the final, I'm so happy, I can relax a little bit now," said Rowan, "I had a really good training run, I was trying to stay relaxed and chilled through it all. The first run I just wanted to land a run and show what I could do. I missed out a trick in the first run just so that I could land and make finals potentially. It was a little bit scrappy, I put my hand on the floor and I missed a grab or so."
"The second run went really well, it was still a little bit scrappy but I've got three runs in finals to clean that up. I'm just happy to make it and show what I can do."
The other Brit in the competition, Molly Summerhayes (20) , finished 17th in qualifications so doesn't progress to the finals.
"I can't believe I got to compete at an Olympics, I'm still in a bit of shock. I'm really happy with the way I skied, it's the best I've ever skied. I'm just speechless. I'm so proud of what I achieved," said Molly, adding, "You have expectations of what the Olympics are going to be like. But it's better. I just think it's so surreal."
The finals begin tomorrow morning at 1am.
Aimee Fuller (26) also didn't go beyond qualifying in the inaugural Olympic big air women's snowboarding event, which took place at the Alpensia Ski Jumping Centre.
Two falls meant Fuller missed out on a place in the final. Her best score of 25.00 left her in 25th with the top 12 progressing.
"You do need a bit of luck sometimes. It's a shame my luck was in the practice and not when it counted. I landed it in training. It's gutting not to land it in qualification," said Aimmee, who added,
"I think this has been the ultimate showcase of our sport and to be a part of such a progressive qualification, it's just insane. You had to do your biggest and best trick. If I landed, then I would have been in the final. I'm glad to know I was a part of that progression chain, but I was just unlucky today. I'm happy with my riding, knowing I'm in the top elective group of girls hucking the doubles makes me proud."