Alberta is bordered by the Northwest Territories to the north, Saskatchewan to the east, the U.S. state of Montana to the south, and British Columbia to the west. The 60th parallel forms its northern boundary, and the 49th parallel forms its southern international boundary. Its western boundary follows the 120th meridian and the crest of the Rocky Mountains. Alberta stretches about 750 miles from north to south and reaches about 400 miles across at its greatest width.
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