The Mount St. Helens eruption anniversary prompts investigation into the California earthquakes: eruption history, threat ...

birdwatch and more this summer Trump says US will not pay for California high-speed rail. Here's what to know The most recent activity in the Clear Lake Volcanic Field occurred between 8,500 and ...

Tahoe is one of one — an enormous, ancient, deep lake ringed by mountain peaks and extinct volcanoes. Though the place is ...

The May 18, 1980, eruption of Mount St. Helens in southern Washington claimed 57 lives and blasted the terrain of old-growth ...

Over the Sierra crest — about 150 miles to the east of Manteca, Oakdale, and Turlock — is one of the world’s largest active ...

The West Coast is packed with iconic beaches, lush forests, charming towns, and some of the best national parks the country ...

Beneath the United States lies a surprising network of caves shaped over millions of years. Some feel almost otherworldly, ...

Other highlights: Clear views of the Cascade Range’s steep-sided stratovolcano Mount McLoughlin, heavily eroded shield volcano ... California, also take the group to Crater Lake National Park ...

Fifty years after Bruce Chatwin embarked on his ‘peculiar, dotty’ bestseller, the South American wilderness still calls ...