The last Cascades frog in Lassen Volcanic National Park in Northern California was well known to amphibian survey crews. Year after year, she turned up near Juniper Lake, full of eggs, seeking a mate.

AP Photo/Caleb Jones VOLCANOES NATIONAL PARK, HI -- For the first time in three years, lava from Kilauea volcano on Hawaii's Big Island is entering the Pacific Ocean - where it's creating new land and ...

Add Yahoo as a preferred source to see more of our stories on Google. They're known as the American Alps, and it doesn't take long in Washington's North Cascades to figure out why. Rows of jagged ...

The West Coast of the United States is home to two of the nation's most iconic mountain ranges: the Sierra Nevada and the Cascades. While both of these places boast innumerable natural charms, there ...