First Day of Summer is Free at National Parks

Mt. Rainier National Park. Photo: M. Reitz

June 21 is nearly upon us and marks not only the first day of summer in the northern hemisphere, and the longest day of the year, but also a free day at over 100 national parks that usually charge entrance fees.

What parks will be free? Here's the list by state.

So if you have the time, take the family and spend your money on gas and dinner instead of entrance fees.