The 57-year-old "Die Hard" actor told county leaders that he would give the Soldier Mountain ski area in Fairfield, which he's owned since the late 1990s, to the right nonprofit. Transferring ownership to a nonprofit would allow for tax-deductible donations to keep the ski area open.
It has been operating at a loss for several years. The ski area boasts 1,150 acres of in-bounds terrain, and its three lifts give access to a vertical rise of 1,425 feet.
Soldier Mountain is popular with families because it's a lot cheaper than the Sun Valley ski resort, which is about an hour away.
The action star has already put his lavish home in nearby Hailey, Idaho, on the market - it's listed at $15 million - along with his local bar and nightclub, The Mint - listed at about $4 million.
The Associated Press contributed to this report.