Denali National Park and Preserve, Alaska is one of the five best stargazing locations in the entire United States. It comprises tall granite spires and snow-clad peaks and covers an area of 160 miles of Alaska Range. Denali National Park and Preserve is known for world famous natural phenomenon known as Aurora Borealis or Northern Lights. This mind-blowing spectacle, occurring on the magnetic poles of the earth, comprises purples, blues, reds and greens dancing joyously on the night sky. Northern Lights, though hard to predict, occur all through the year. They are more clearly visible in the second week of August when the night sky is quite dark. The amount of darkness increases with each succeeding night during the fall, winter, and early spring - the reason is that Denali recedes farther and farther away from the sun during this period. Stargazers can expect fantastic time as the darkness stays for longer hours during these periods.