A 53-year-old Bay Area man died at a Tahoe ski resort on Sunday, the Placer County Sheriff's Office confirmed to SFGATE in an email. On Feb. 15, Northstar ski patrol responded to an on-mountain collision of two guests on the Polaris trail at Northstar California Resort. The Northstar Fire Department pronounced one of the skiers dead, Northstar California Resort spokesperson Dennis Baggett told SFGATE in an email.