Big Sky is running its season pass sale through September. Four different products are available, and the math is easy. All season pass products during the sale are discounted by $100.

The Big Sky Resort Unlimited Season Pass has no blackout dates. It is good for skiing all lifts at Big Sky Resort, but does not include Moonlight lifts. Adult passes cost $1,375. Purchasers get a free $50 gift certificate included. Rates for juniors, college students, and seniors are also available.

The Biggest Skiing in America Passes, which access both Big Sky and Moonlight Basin lifts, are on sale. Adult passes cost $1,739. Special sale rates are also available for juniors, college students, and seniors. Purchasers also get a free $50 gift certificate.

The 15X Sky Card, which has no blackout dates, offers skiers 15 days of skiing or riding. Cardholders can access the lifts free Nov. 29 - Dec. 5 and April 5 - April 11 and have the option to buy lift tickets at the Frequent Sky Card rate once the 15 tickets are used up. The sale rate for adults is $715. Rates for juniors, college students, and seniors are also available.

The Boyne Resorts Unlimited Season Pass is also available for $1,799. The pass is valid with no blackout dates at all 10 Boyne Resorts across the U.S.

Purchase season passes online. The pass sale ends Sept. 30.

More information. Or call 406-995-5749.