Featuring the tallest peak in the US at just over 20,000 ft high, Denali National Park consists of an astounding six million acres of wilderness, tundra, mountains and more. Only one road runs the length of the park (92 miles) and only one entrance welcomes visitors—this keeps the area as untouched and natural as possible. Established in 1917, the park runs bus tours throughout the year and also gives visitors during certain seasons the opportunity to explore off-the-beaten-path trails. Here, most inevitably see a bevy of wildlife, from grizzly bear and caribou, to Dall sheep and wolves.
The tallest peak in America, and until 2015 known as Mt. McKinley, Denali has been a sought after conquest of mountain climbers since the very early 1900s. Mountaineering is thus hugely popular within the park. There are several sub peaks and nearby peaks for those not quite up to expert level climbing as well.
Because it is so expansive and because it’s not been overly developed in the slightest, Denali is a very popular destination for dog mushers. Even those inexperienced in mushing, can book tours and watch live demonstrations throughout the year.
Cross country skiing and snowshoeing are an excellent way to explore the landscape. Follow sled dog trails or venture into some lesser known areas.
Denali really has two seasons: summer and winter. Winters are long, starting as early as September and going through April. The park is difficult to explore during the middle of winter as the road isn't even plowed for about 4-5 months.
Spring is a time of quick transition and it is wildly unpredictable.
Summer is the tourist season. The days are long, the weather is reasonable, and it is the best time to explore the park.
Fall is short and changes year-to-year. The park's website tells it this way "Once snow closes the park road, winter has arrived."