Add Yahoo as a preferred source to see more of our stories on Google. California’s active volcanoes include Mount Shasta, Lassen Peak, Medicine Lake Volcano, Long Valley Caldera, Coso Volcanic Field, ...

Mount Shasta, a steep-sided Cascade Range stratovolcano in Northern California, looms above Little Glass Mountain, a thick obsidian flow erupted from the Medicine Lake shield volcano about 1,000 years ...

For outdoor exploration in stunning national parks, California is the land of plenty. From the towering trees of Sequoia National Park, to the undulating, Mars-like landscapes of Death Valley, there's ...