According to the Vail Daily, the family claims Vail Resorts was negligent and created an avalanche trap that killed the boy.
Officials say a gate was closed at the top of the mountain, but it was open midway, allowing skiers on the trail.
The U.S. Forest Service determined that Vail Mountain was following procedures and permit requirements when Taft Conlin was caught in an avalanche in the Prima Cornice area Jan. 22.
Vail Resorts declined to comment on the lawsuit.
(Copyright 2012 by The Associated Press. All Rights Reserved.)