makes a great case for something large calibered, and portable like the .454 Casull or the .454 Alaskan. Both of those revolvers will work well in all types of climates and it packs a load that will definitely penetrate. Granted, this story was out of Canada, not Alaska, but the bears don't really care what flag is flying over the hunting ground.
That said, your primary weapon should be something big and hard hitting as Robo indicated above.
That world record Grizzly that was taken down a couple of years ago got hit with several rounds
from a 338-caliber Winchester Magnum according to the debunked urban myths about the report.
Better yet, just stay close to the ski lodge and have a few drinks with the ski bunnies in the club house instead.