Arizona is home to more than three dozen national parks, sites and monuments. These 10 easy to moderate hikes show off the ...

The “Roof of Africa” is the continent’s most climbed peak—which often means trekking in the company of crowds. These five climbs offer under-the-radar alternatives with challenging trails and wild ...

Deer Valley unveiled one of the biggest ski resort expansions in history, and Graham Averill reports on skiing it, with an Olympian, no less.

January doesn’t skimp on cosmic sightseeing. The month begins with a vibrant supermoon, continues with the year’s best Jupiter view, and ends with multiple moon-planet conjunctions. Aurora activity ...

Though it sounds hard to believe, if not insane, I kid you not when I say that I find winter hiking in the Adirondacks easier than summer hiking, if — and it’s a big if — conditions are ideal. A ...