So, based on your activity and restrictions for what you are carrying, then traditional fire starters seem the way to go.

Lighters (zippo / butane) certainly have issues at altitude and temps.

Matches tend to be unreliable as well, but may have uses.

Firesteels (fero rods) and spark lighters do well in any temp / alt. The key is dry tinder and shielding that tinder from the elements.

As stated before, a nice piece of fatwood will do wonders for you once you get the tinder lit and you want to step up into getting available wood to light. You can get fatwood wet and still be able to scrape off useful bits for a fire. It is easy to carry as well.

Getting a piece of tinder lit is easy. Building a functional fire is trickier, esp in winter / wet conditions.

The best advice, go out in a not survival situation, dress warm, and practice practice practice. Go out just after a rainstorm. Go out in winter where everything is covered in snow. Try using only one hand while building a fire. If you can get a fire going in those conditions, you'll be more prepared in case something does happen to you while snowboarding.