The search for a final missing skier continues but that person is presumed dead, Nevada County Sheriff Shannan Moon said at a news conference on Wednesday.
Officials said one of the deceased was the spouse of someone on one of the search-and-rescue teams, making continued rescue efforts "challenging emotionally".
Fifteen skiers were reported missing on Tuesday after a "football-field" sized avalanche came barreling down in the Castle Peak area around 11:30 PST (19:30 GMT). Six have been rescued.