"I was in Austria. The pipe wasn't the best conditions. I had this ankle issue which prevented me from competing further at the Mammoth qualification," White, who is competing at his fifth Olympics, told reporters.
"I had this knee issue from where I had surgery in the summer before, and I injured my back working out randomly," added White.
"And on the chairlift ride, the mountain was closing and no one was around, and I was watching the sun go down, and it just hit me. I was like, 'this is it, these are the signs.'
"It was a very sad and surreal moment, but very joyous as well. I reflected on all the things I've done, and looked at that sunset going down, and I thought: 'Next time I'm here I won't be stressed about learning tricks.'
"I won't be worried about some kind of competition. I'll just purely be here to enjoy the resort, maybe check out other runs besides the halfpipe for once.'"
Once dubbed the "Flying Tomato" because of his flowing red hair, White has won three halfpipe Olympic gold medals since his Winter Games debut at Turin in 2006, adding 13 titles at the Winter X Games to become one of the sport's most iconic figures.
"This has all had its amazing glow to every single decision and every single competition because I've decided this will be my last Olympics," said White.
"I've been giving it my all, there have been some ups and downs along the way to get here. But through all that, I feel I've got stronger and better.
"I'm just so excited about everything. Opening ceremony was incredible. The venue looks incredible, just enjoying every single moment."
The men's snowboard halfpipe qualification at Beijing 2022 is on Wednesday, with the final run medal event on Thursday.
"I've done so much in the sport -- I hope that my riding speaks for itself. I'm always trying to push and progress and do the next biggest things and try to pick up with what trends are happening within the sport and be ahead of that curve. I'm just kind of enjoying every moment.
"I'm most proud of staying on top of the sport that's ever-changing for as long as I have done. That's legacy performance."