Montana ( ) is a state in the Western United States. The western third of the state contains numerous mountain ranges; other 'island' ranges are found in the central third of the state, for a total of 77 named ranges of the Rocky Mountains. This geographic and geographical fact is reflected in the state's name, derived from the Spanish word montaña (mountain). The state nickname is the "Treasure State." Other nicknames include "Land of Shining Mountains," "Big Sky Country," and the slogan "The Last Best Place." The state ranks fourth in area, but 44th in population, and therefore has the third lowest population density in the United States. The economy is primarily based on ranching, wheat farming, oil and coal in the east; lumber, tourism, and hard rock mining in the west. Millions of tourists annually visit Glacier National Park, the Battle of Little Bighorn site, and three of the five entrances to Yellowstone National Park.

Geography

Map of Montana

With a land area of the state of Montana is the fourth largest in the United States (after Alaska, Texas, and California). To the north, Montana and Canada share a border. The state borders the Canadian provinces of British Columbia, Alberta, and Saskatchewan, more provinces than any other state. To the east, the state borders North Dakota and South Dakota. To the south is Wyoming and to the west and southwest is Idaho.

The topography of the state is diverse, but roughly defined by the Continental Divide, which runs on an approximate diagonal through the state from northwest to south-central, splitting it into two distinct eastern and western regions. Montana is well known for its mountainous western region, most of which are geologically and geographically part of the Northern Rocky Mountains. The Absaroka and Beartooth ranges in the south are technically part of the Central Rocky Mountains. However, about 60% of the state is actually prairie, part of the northern Great Plains. Nonetheless, even east of the Continental Divide and the Rocky Mountain Front, there are a number of isolated "island ranges" that dot the prairie landscape. This island range region covers most of the central third of the state.

The Bitterroot Mountains, one of the longest continuous ranges in the entire Rocky Mountain chain from Alaska to Mexico, divide the state from Idaho to the west with the southern third of the range blending into the Continental Divide. Mountain ranges between the Bitterroots and the top of the Continental Divide include the Cabinet Mountains, the Missions, the Garnet, Sapphire, Flint Creek, and Pintlar ranges.

Montana terrain The northern section of the Divide, where the mountains give way rapidly to prairie, is known collectively as the Rocky Mountain Front and is most pronounced in the Lewis Range located primarily in Glacier National Park. Due to the configuration of mountain ranges in Glacier National Park, the Northern Divide (which begins in Alaska's Seward Peninsula) crosses this region and turns east in Montana at Triple Divide Peak. Thus, the Waterton, Belly, and Saint Mary rivers flow north into Alberta, Canada, joining the Saskatchewan River and ultimately emptying into Hudson Bay.