Light a Fire in the Snow
While a campfire isn't usually necessary when camping in the
backcountry, it can be a lifesaver when you have to confront the
threat of hypothermia or deal with wet clothing and gear.
Carry dry tinder in a zipper-lock bag; it's great for getting wet wood
Remember to bring firestarter paste or sticks with you.
Carry waterproof matches and a windproof lighter; store these in a
zipper-lock bag for extra measure.
Consider carrying a "fire pan" with you when venturing into snowy
environments. A fire pan is basically any flame-resistant metal pan
with high sides that can keep ashes and wood inside of the pan.
Place the fire pan onto several rocks or logs to keep it from sinking
as the snow melts and light your fire.
Dig a hole in the snow and cover the inside of the hole with a layer
of small to medium-size sticks if you're building a fire directly in
the snow. These sticks will protect the burning wood from melting
Use firestarter paste or sticks to get your fire going. If you don't
have these with you, use shavings from dry wood - or paper torn from
any books you have if your situation is desperate.
Never break off twigs or branches from a standing tree, even if the
tree appears to be dead. Only use wood that has fallen on the
ground. Make sure that you're allowed to collect fallen wood in the
wilderness area you are visiting. Never light a campfire if camping in
an alpine area, even if fallen wood is available. It takes hundreds of
years for alpine areas to recover from fire.