Schweitzer Mountain has their Ski3 packs on sale now. But you must jump on them soon while they are available.
The Ski3 packs include three lift tickets to use any day during the 2013-14 winter season. For adults, that means a discount of $16 off the ticket window price. As an additional bonus, the tickets are transferable, so you can split the Ski3 packs between several skiers or give the individual tickets away as gifts.
Ski3 packs cost $165. They are only on sale through Nov. 10, 2013. The easiest way to get them is purchasing online.