Can I buy passes before I need them?

Yep! Unlike a ski resort where you have to assign which day you want to use a ski pass when you buy it, Slopes passes sit on your account and never expire while they are unused. Even across seasons. 

When you're finally at the mountain and ready to go, you can activate a pass by taking these steps:

• Go to the Account tab
• Tap on Remaining Passes
• Tap on Activate Pass
• Pick the date that you want to activate the pass for (from here you can also activate a pass for a recording in the past if you want to)
• Tap on Use Day Pass