Some of the choices in 2011 are Death Valley, Joshua Tree, Yosemite, Pinnacles, Muir Woods or another favorite national park at no charge on
- April 16-24 (National Park Week),
- June 21 (first day of summer),
- September 24 (National Public Lands Day), and
- November 11-13 (Veterans’ Day Weekend).
to see the whole list State by State of Free Entrance Days in National Parks 2011