A spokesman for the Sierra Club says the organization never intended to use a photo of a hiker atop Mesa Arch in Canyonlands National Park to lure new subscribers.

What were they thinking at the Sierra Club when they dreamed up their latest solicitation for new members? Did the organization, which touts itself as America's "most influential grassroots environmental organization" and "Good Stewards of the Environment," really intend to use a photo of a hiker atop Mesa Arch in Canyonlands National Park?

Our national parks are places of incredible beauty and rich history. But they also are under siege. Across the National Park System, the landscape is being invaded by non-native species that are not just out of place, when you consider what should be growing, but in some cases are actually driving out the natives.

As energy prices creep steadily higher, there's a growing segment of America that believes short-term relief can literally be tapped from fossil-fuel resources in the Western states. But many of those resources are found on public lands that buffer national parks, national wildlife refuges, and wilderness areas, and their development could have dire consequences for those landscapes.

May is one of the more enjoyable months to visit Canyonlands National Park in southern Utah, but for a college professor from Minnesota a backcountry trek apparently has gone amiss.

Could it actually be true? Are Doc Sarvis, Bonnie Abbzug, George Washington Hayduke III, and Seldom Seen and their monkey-wrenching exploits in the Southwest really coming to the big screen?

For decades folks have debated what created Upheaval Dome in Canyonlands National Park. Well, some German researchers claim they've solved the mystery.

U.S. Bureau of Land Management efforts to spur development of "tar sands" in Utah near several national park units are being watched by the National Parks Conservation Association.

A natural resources juxtapositonal twist of fate has placed the spectacular Canyonlands National Park and Glen Canyon National Recreation Area in close proximity to an energy deposit whose extraction could sully the park units.

Off to the west of Canyonlands National Park proper, Horseshoe Canyon offers a fascinating trip back into prehistory, a time when nomadic tribes would follow the washes through the Southwest's canyon country from camp to camp.