Haha. Lets start in LA then.
If you want park, go to Mt. High. its 1 hour from the beach
If you want pow, go to Mt. Baldy. Also 1 hour away.
If you really feel like it, go 2.5 hours east to Bear and Snowsummit.
Then, if youre in San Francisco, you can surf at Ocean Beach in the AM, then tear up i80 and 3.5 hours later you can ski at boreal, or Squaw until 9pm.