Grizzly and black bears are starting to come out of hibernation in Grand Teton and Yellowstone national parks, prompting officials there to warn visitors about the hungry bruins.

A collection of artists' shacks set in the dunes of Cape Cod National Seashore has been added to the National Register of Historic Places following two years of study.

A second search-and-rescue mission in the past week has been initiated at Great Smoky Mountains National Park, where a 23-year-old man is thought to have vanished in the park not far from the Sugarlands Visitor Center.

You can start planning: National Park Week will fall April 21-29 this year, with activities planned throughout the National Park System.