For winter driving, I propose a road that most haven't heard of: Titus Canyon in Death Valley National Park. It's only 26 miles long but combined with a visit to Rhyolite, will take all day.
Oh yeah, it isn't paved, but generally suitable for careful drivers in 2wd cars. You do need to bring your own water and food.
You will be amazed at how stunning this ride is.
Also, what about Tioga Pass and Yosemite Valley?