Free entry to all 392 national parks April 17-25

Get into all 392 of America's National Parks for free from April 17-25, 2010. The freebie is part of a week-long series of events and festivities known as National Parks Weeks that serves to raise awareness of our country's natural beauty. It also coincides with Earth Day, which is April 22.

Saturday, April 24, is National Junior Ranger Day, when children can take part in activities to earn a junior ranger patch. Many of the activities are specific to each park. There are also special offers at Yellowstone, Lake Powell, the Grand Canyon, and many other parks.

If you miss the free entry week in April, National Parks are also free on September 25, 2010 for Public Lands Day, and on November 11, 2010 for Veterans Day. Read the full list of fee-free parks.