As more and more visitors to Glacier Bay National Park and Preserve stretch their feet along the shores of the 62-mile-long bay, they are inadvertently driving wildlife deeper into the park, according to a new study.

The hunt for Greater Short-Horned Lizards in the bearpaw shale of Grasslands National Park gets off to an inauspicious start on a cool September day as the sun fights to break through the clouds.

With 423 units of the National Park System from which to choose, there will never be a shortage of questions and interesting trivia to test your knowledge and provide you with a fact or two you can use to impress family, friends, and colleagues.

Two moderate earthquakes, one of which registered as a magnitude 5 temblor, rattled the island of Hawaii on Friday morning and could be related to recent geologic activity at Mauna Loa in Hawai'i Volcanoes National Park, the U.S. Geological Survey reported.