Traverse the National Park System and you'll come across lots of different land forms, from forests to sand dunes, lakes to ponds, mountains to canyons. But where in the park system will you see these land forms?

A heat wave baking the West might have played a role in the death of a 59-year-old Arizona woman who was on a multi-day backpacking trek through Grand Canyon National Park.

The details of the struggle over Mineral King, which lasted from the mid-1960s to the late 1970s were difficult to follow; the world of environmentalism was busy with many issues and developments, and the Mineral King issue was part of the noise of the time. Legal expert Daniel Selmi tells the Mineral King story in clear prose and brilliant detail.

Visitors to Mount Rainier National Park who venture into "ice caves" are risking their lives, according to park officials.