The venue hosted a World Cup biathlon event last year but the shape of the course has been modified since.
The new part of the track will be used in the women’s 7.5K sprint on Sunday, and after that in the women’s 12.5K mass start, the men’s 12.5K pursuit and the three relays.
U.S. head coach Per Nilsson told The Associated Press he was "a little surprised it was a little on the short side."
"It’s still the Olympics, so they should have measured that before," Nilsson said. "Five percent (deviation) is allowed but this felt like a 7K (for the women’s 7.5K). It was the right decision they corrected it. Everybody is happy with that."
Another change to the track moved the starting line back by more than 30 meters. In the initial course set, athletes were not given enough time to speed up from the start before approaching a steep hill.
Nilsson called the course "super tough. It will be a big fight."
"In some courses on the World Cup you have big climbs and then you have quite some recovery," Nilsson said. "Here you’re down to the bottom in a tough downhill, so you don’t recover the legs and then you have a long, long climb."