[BravoAlpha]

I'd recommend hiking a southern portion of the PCT. You do the math as far as distance is concerned, given your window and estimated pace. You will encounter "winter conditions" though, even in CA. For example, if you undertake anything above 11k, you'll need crampons and an ice axe.

For the PCT, figure out how much ground you'll cover each day and you can plant provisions along the way. Use the bear containers located at the branch-off trail heads. Some of the winter ranger posts will also allow you to leave provisions.

Another option would be hiking through and around Zion National Park. That's canyon heaven. Though, the winter months can be pretty unforgiving in that region, for a number of reasons.