do you normally lift weights or do heavy lifting (squats, deadlifts, etc.)?
Well, whether or not you do them, I'd change up my workout for the week for endurance lifting workouts.
Here's a sample workout regiment:
Day 1: Squats 4X12-15 (means 4 sets of 12-15 reps)
Stiff Leg Deadlifts (Or deadlifts if you want some core and back work) 4X10-15
Leg Press 4X12-15
Calf Raises 3X12-15 (don't need to isolate too much)
Day 2: Abs (try and do about 4-5 exercises, 4 sets of 10-15 each)
I'm going to stop right here because if you work out, you can just use your common sense to implement the leg workout into your own workout. if you don't, I suggest getting two of these leg and ab days in before you go. Not the day before you board though.
If you NEVER lift, do this ONCE early this week INTENSELY and you will be sore for a good 4-5 days. In a week you should be good. The reason I suggest high rep and not heavy lifting is because that it will help with endurance and balance, both crucial for some long and injury free snowboarding days.
Stretch before you board. I always forget to stretch until I'm with my group of friends at the bottom walking over to the lift. Makes me look like an idiot doing half assed calf stretches with all my gear on.
EDIT: I just read the above posts and I personally, would not recommend jogging. That's my personal opinion though. Jogging will not have any MUSCULAR or BALANCE benefits for boarding. It will have cardio benefits however. Unless you plan on doing a lot of walking up the hill to find your friends or some shit.
Just a side note, jogging or running is not a recommended exercise for many reasons, particularly bad joints. Circuit and high intensity/low rest workouts can be a lot more beneficial, in addition to muscle growth. I'm rambling.
If you want to read about it,
TESTOSTERONE NATION - Training Disasters
Otherwise, goodluck. I cannot fukin wait to go to mammoth this saturday.