www.skilaketahoe.com have released a voucher packet for day tickets to up to 8 resorts namely Sugarbowl, Homewood, Mt Rose, Squaw/Alpine, Heavenly, Sierra-at-Tahoe, Kirkwood and Northstar. It's a pack of prepaid day tickets which vouchers to 'ski at X Resort or ski at Y Resort'. It's not a season pass. You can't use the vouchers up at 1 resort. You can't use 2 vouchers for 2 people at the same resort on the same day. It's designed to get people 'sampling' different resorts. These vouchers usually sell out by late August to September.
If the might suit your travel needs, check the fine print for blackouts etc.
PS: Skilaketahoe's wwebpage looks like they have to uupdate the new partners of Sugarbowl and Homewood