I organized a group buy for Sierra at Tahoe and have plenty of promo codes left:
Email me for your individualized one-time-use code. Use this code at checkout for however many tickets you want and it gives you the discounts shown in the image above (generally $60 savings).

www.sierraattahoe.com/season-passes/

The unlimited pass does not have any black-out dates
and only $299 for college students ($60 savings with group buy)

https://www.sierraattahoe.com/season-pass-benefits/
NO BLACKOUT DATES
Power Alliance - access to 15 other resorts, (not in tahoe), restrictions apply mostly ~ 3 free days at each, located in Colorado, California, Oregon, JAPAN, Chile! Lol
FOUR BFF Tickets- your friends can pay $50 for lift tickets non-holidays non-Saturdays. Valid during the 2017-18 winter season, any day, non-holiday; excludes: December 26-31, 2017 | January 13-14, 2018 | February 17-18, 2018. Limit of 2 redemptions per day. Passholder MUST be present to redeem.
Bring a friend for FREE on select Fridays! One per Friday; valid during the 2017-18 season on or before 12/15/2017, on 1/5/2018 and all Fridays from 3/16/2018 to the end of the 2017-18 season. Unlimited Season Passholder MUST be present to redeem.