Pretty much no where is going to have good coverage by then unless some place gets a really good October. Wolf Creek Colorado got almost 100" in an October 5 or 6 years ago, or something like that. In Cali, you are going to probably have better mountain biking. The only fairly good bet I can think of is Mt Hood in Oregon.
Most places that are open by then are going to have one maybe two runs open all man made. Otherwise known as the white ribbon of death. The WROD gets crowded, is icy, and is a great place to end your season (think collisions, torn acl's etc) before it's even started.
In reality though, you'd be better off waiting until January for good conditions.