GRAND TETON NATIONAL PARK, established in 1929, a picturesque district in north-western Wyoming, U.S.A., with an area of 150 sq.m., situated about 25 m. S. of Yellowstone Park. It embraces a region of unusual scenic grandeur, including the Teton range, which is a remarkable granitic uplift, with glaciers in the cirques and gorges. On the west it borders the Jackson Hole country. Grand Teton (13,671 ft.) is one of the most difficult peaks to climb in the United States.