Mount Rainier National Park is open all year. Visitation is at its peak in July and August, when the sun warms the earth enticing mountain meadows to blossom. Parking is limited in many areas of the park especially on busy summer weekends and holidays.  If you are planning a summer trip to Mount Rainier, consider visiting mid-week, which is generally less crowded.

In spring, with ephemeral waterfalls and autumn, with brilliant colors reaching deep into the valleys, visitors can enjoy a more leisurely vacation in the park. During these seasons, weather may determine the availability of facilities in certain areas of the park. Before making any plans check the current status of roads, campgrounds, trails and activities.

Vehicle access to Mount Rainier in the winter is only available from the Nisqually Entrance, in the southwest corner of the park on the way to Paradise.  The Carbon River Entrance is open but the road within the park boundary is limited to foot and bicycle traffic.