A mild winter and spring are helping crews at Denali National Park clear snow and ice off the Denali Park Road, which was scheduled to open to Mile 30 today.

With 401 units of the National Park System, how do you decide what to do during National Park Week? The folks at the National Park Service and National Park Foundation have some suggestions for you.

Timing often is happenstance, but with Earth Day arriving next week, word of high mercury levels in fish in national parks from Alaska to Colorado is particularly sobering. In some cases, the levels exceed limits OKed for human consumption.

Nearly a century ago, the dramatic landscape now included in Craters of the Moon National Monument was virtually unknown to all but a few hardy adventurers. One of them, Robert Limbert, hiked across the area in 1920, and his photos and articles are credited with spurring creation of the Monument in 1924. This week, a small group of hikers is recreating Limbert's historic trek, and sharing their progress via social media.