Many season passes are cheaper during the summer.
Whiteface and Gore sell a joint season pass- non-holiday is $565 and full season is $720. This deal is good until the 21st of June. A lift ticket to Whiteface is $57 so after ten times you are riding for free. When you have a season pass at these mountains you can get discounted tickets, tunes, and food. After the 21st of June prices go up.
Squaw has three different types of season passes. You can ride whenever you like with the Gold Season Pass. The Silver Season Pass does not allow you to ski: December 26-31, 2011, January 14-15, 2012, and February 18-19, 2012. The black out dates for the Bronze Season Pass are: December 26-31, 2011, January 14-15, 2012, February 18-19, 2012, and all Saturdays in January and February. The Gold is $699, the Silver is $499, and the Bronze is $399 until June 15th- then prices go up. A lift ticket at Squaw during the regular season is $86 so you ride for 8 days and then you are skiing for free with the Gold pass.
You can buy an Epic Pass through Breckenridge for $649. An Epic pass is named appropriately because it gives you unlimited days at Breck, Vail, Beaver Creek, A-basin, Keystone, Heavenly, and Northstar. Basically you should sell all your stuff and buy an Epic Pass. If you are a local you can get an Epic Pass for $499, but there are blackout dates. Enter to win an Epic Pass.