Much of the Glacier National Park is inaccessible to vehicle traffic during the winter months, but the park remains open. Some of the areas around Lake McDonald make for great snowshoeing, cross-country skiing, and winter camping. Though it requires more preparation and far more layers of clothing, the park is beautiful and much quieter during the cold months. The bears are hibernating and except for a handful of other hardy souls, you'll practically have the park to yourself in the off-season. Just be sure to fill the gas tank, pack your snacks, and bundle up!