This article originally appeared in Travel+Leisure.

Glacier National Park may be one of the nation’s most-visited national parks, but thanks to its spacious 1,583 square miles of wilderness — home to over 762 lakes and 700 hiking trails — it’s maintained a sense of solitude. The preserved piece of land is a haven for 71 animal species, 276 documented bird species, and the three million human visitors it draws each year.

It doesn’t matter if you visit for a week or a single day, or if you prefer to hike or explore by car — there’s plenty to do and see (even virtually). And that’s true whether you visit in July or January. While the park is open year-round, there are certain benefits to visiting during particular seasons. To help you plan your trip, we’ve compiled a little guide on the best (and worst) time to visit Glacier National Park.