Two of the skiers had to be rescued after becoming lost.
The Jackson Hole News & Guide reports that Andrew Richards of Jackson, Ruth Schwietert of Jackson, Natalie Burns of Breckenridge, Colorado, and Joseph Higgins of Portsmouth, New Hampshire, all ended up pleading guilty to violating an emergency closure. Richards also pleaded guilty to disorderly conduct.
All four received varying terms of unsupervised probation and fines and fees.
National Park Service officials said the incident put rescuers at unnecessary risk because of the dangerous backcountry avalanche conditions at the time.