America's national parks already are one of the best family holiday deals anywhere in the world, but on five weekends this year, the more than 100 national parks that charge an entrance fee wil be an even better deal: they'll be free.
The 2011 dates are:
The fee waiver includes entrance fees, commercial tour fees, and transportation entrance fees. Other fees such as reservation, camping, tours, concession and fees collected by third parties are not included.Many of the 394 national parks are free every day. So start Planning Your Visit!