Mammoth on the west... and i'm sure a lot of the TAhoe resorts are open. And, if i lived on the east, i'd so be hiking Tuckermans. Shit looks gnar, and super intense.
theres a good number of places open out west, but you dont need lifts. theres an insane amount of backcountry thats still awesome all over the place, just get yourself too a high mountain pass.