Campfires can cause lasting impacts to the backcountry. Use a lightweight stove for cooking and enjoy a candle lantern for light. Even where they are allowed, campfires are discouraged on Mount Washington, due to the impact they have and the high number of visitors.
Where fires are permitted, use established fire rings, fire pans, or mound fires. (Fires are never permitted above treeline on Mount Washington; fires are never permitted in the Cutler River Drainage (the area on the eastern side of the mountain which includes Tuckerman Ravine, Huntington Ravine, and the Alpine Garden).)
Keep fires small. Only use sticks from the ground that can be broken by hand.
Burn all wood and coals to ash, put out campfires completely - DEAD OUT - then scatter cool ashes.
It's so important, it has to be said again - if you have a campfire, make sure it is DEAD OUT before you leave camp.