The Natural Landscape

In Wyoming, the earth seems to have turned itself inside out, its hot insides leaking into hot springs and geysers, its bony spine thrust right through the skin of the continent to form the Continental Divide, making it a geologist's dream. And to a biologist it's heaven, one of the last regions in the United States with enough open space for animals like elk and grizzly bears to roam free.

Plains, basin, and range alternate in this high-altitude environment that is in large part defined by its extremes of weather and climate. These changing landscapes make Wyoming one of the best vacation spots in the country for travelers who like their scenery dynamic and dramatic.

The western side of the state is mountainous, dragging moisture from the clouds moving west to east and storing it in snowpack and alpine lakes. Because the ridge of the Rockies wrings moisture from the atmosphere, you find deeper, denser forest extending far to the west, while on the east side, the lodgepole pine, spruce, and fir forests give way to the Great Plains, a vast, flat land characterized by sagebrush, native grasses, and cottonwood-lined river bottoms.

But a lot of the landscape dates back more than 100 million years to when the collision of tectonic plates buckled the earth's crust and thrust these mountains upward. Later, glaciers (of which some vestiges remain) carved the canyons. The tallest peaks in Wyoming are located within the Wind River Range, which rises from the high plains of South Pass and runs northwest to the Yellowstone Plateau. Nine of the peaks in the Winds have elevations over 13,000 feet; Gannett Peak, at 13,785 feet, is the highest in the state. Several other mountain ranges are found to the south of Yellowstone -- including the Absarokas and the stunning Tetons -- and from Yellowstone north into Montana run other dramatic ranges, including the Gallatin, Madison, Mission, Bitterroot, Cabinet, and Beartooth, where you'll find Montana's highest point, Granite Peak, at 12,799 feet.

The Continental Divide enters Montana from Canada and traces a snaking path through both Montana and Wyoming. Both states have rivers flowing west to the Pacific and east to the Atlantic.

Here you'll also find the headwaters of major river systems -- the Flathead and Clark Fork heading west into the Columbia from Montana, along with the Snake from Wyoming; the Yellowstone, North Platte, and Madison joining the Missouri bound east; and the Green from Wyoming emptying into the Colorado heading south. These rivers are the lifeblood of the region, supplying irrigation, fisheries, and power from dams. Montana also boasts the country's largest freshwater body of water west of the Mississippi River: Flathead Lake. Yellowstone and Jackson lakes are Wyoming's two largest natural bodies of water.

Wyoming has been dealt an interesting hand of natural wonders: Waterfalls, geysers, and other geothermal oddities at Yellowstone; as well as the natural landmark of clustered rock columns that rise more than 1,280 feet above the surrounding plains at Devils Tower National Monument, near the state's Black Hills region of the northeast. At Wyoming's Red Desert, south of Lander, the Continental Divide splits to form an enclosed basin where no water can escape, and nearby you find Fossil Butte National Monument, an archaeological treasure chest of fossilized fish and ancient miniature horses.

The states are characterized by long, cold winters and short summers of hot days and chilly nights. Temperature ranges are dramatic, and are largely dependent on elevation. Except along the far western edge of Montana, precipitation here is less than 30 inches a year. It's considerably less as you journey east and south. But the snowpack in the high mountains -- more than 300 inches accumulate in some areas -- melts through the summer and keep the rivers running.