Tamarisk, or salt cedar, is a highly invasive plant that has caused plenty of problems in the West. A test project to control the pest with the tamarisk leaf beetle has been underway since 2001 in parts of the country, but a few of the beetles have turned up unexpectedly in the upper end of the Grand Canyon. Will this prove to be a case of "Oh, my," or "Oh, me"?

Frivolous calls to 911 centers are a growing problem all across the country, but when the call comes from a remote location in Grand Canyon National Park, both the expense and risks of an emergency response increase dramatically. A group of hikers recently activated their SPOT device not once, not twice, but three times on the same trip.

With winter not too far off here in the Rockies, it's only natural to begin to consider which national park to visit before the spring thaw arrives. Our question to you: Do you focus on snow, or sand, when you think of a winter national park escape?

Quite frequently there's talk about adding units to the National Park System. But where do you begin, and where do you draw a line? Well, it turns out the National Park Service has a cheat-sheet of sorts that touches on the timelines of studies into proposed units of the system.