While One Direction singer Harry, 19, carried a pair of skis, 18-year-old Kendall was seen holding a snowboard as the pair headed off to enjoy the alpine thrills on offer at Mammoth Mountain.
For the chilly outing reality TV star Kendall wore warm grey trousers and a purple striped top under a large black jacket.
The model accessorised her look with a printed neckerchief and wore her dark hair in a plait.
Harry sported an all-black ski suit, reflective goggles and a green beanie hat.
Fans of the famous teens were quick to let the world know that they were on holiday together.
"Casually hanging out with Kendall Jenner and Harry Styles. #dying," wrote one lucky local girl named Allie Connolly.
Harry and Kendall have been spotted in both the US and the UK enjoying a series of romantic trysts and dates.
The Worcestershire-born singer was also seen in LA on New Year's Day after Kendall had tweeted that she had spent previous the night there with family and friends.