Entrance fees to Rocky Mountain National Park and all 393 National Park Service sites will be waived during National Park Week, April 16-24.

In January, Secretary of the Interior Ken Salazar announced 17 fee-free days at national parks and monuments during 2011. National Park Week is the longest fee-free period this year.

Additional fee-free dates will be the first day of summer (June 21), National Public Lands Day (Sept. 24), and the weekend of Veterans Day (Nov. 11-13).

For additional information on Rocky Mountain National Park see the RMNP website.