Fall River rises on the Madison and Pitchstone Plateaus in the southwest corner of Yellowstone National Park, Wyoming and flows approximately 64 miles (103 km) to its confluence with the Henrys Fork of the Snake River near Ashton, Idaho. Historically, the river was referred to as the Middle Fork of the Snake River or as Fall River or the Falls River by trappers and prospectors as early as the 1830s. It was officially named the Falls River by 1872 Hayden Geological Survey, but was always called Fall River by the locals and so the U.S. Board on Geographic Names changed the official name to Fall River in 1997 at the request of Idaho authorities. The river is home to numerous waterfalls and cascades in its upper reaches.
Bechler Falls ht. 15 feet (4.6 m) is a waterfall on the Bechler River in Yellowstone National Park. Bechler Falls is the last waterfall on the Bechler River and is approximately 1 mile (1.6 km) from the confluence with the Fall River. It can be reached via the Bechler River trail approximately 3.5 miles (5.6 km) from the Cave Falls trailhead at the south boundary of the park. The falls were named in 1921 by explorers E. C. Gregg and C.H. Birdseye.
Iris Falls is a waterfall on the Bechler River in Yellowstone National Park. Iris Falls is located just upstream from Colonnade Falls and is accessible via the Bechler River Trail. The falls were named in 1885 by members of the Arnold Hague Geological Survey for Iris, the mythological Greek goddess of the rainbow.
There are nine named plateaus in Yellowstone National Park. These plateaus are part of the much larger Yellowstone Plateau and dominate areas in the park south and west of the Gallatin and Absaroka mountain ranges. Four of the plateaus are from rhyolite lava flows that occurred between 110,000 and 70,000 years ago.
The Nez Perce native Americans fled through Yellowstone National Park between August 20 and Sept 7, during the Nez Perce War in 1877. As the U.S. army pursued the Nez Perce through the park, a number of hostile and sometimes deadly encounters between park visitors and the Indians occurred. Eventually, the army's pursuit forced the Nez Perce off the Yellowstone plateau and into forces arrayed to capture or destroy them when they emerged from the mountains of Yellowstone onto the valley of Clark's Fork of the Yellowstone River.
Square Butte is a name used for 11 buttes in Montana. Two of the most prominent buttes are located in a) Cascade County, Montana, about 22 miles (35 km) due west of Great Falls and in b) Chouteau County, Montana, about 50 miles (80 km) due east of Great Falls and about 15 miles (24 km) due east of the Highwood Mountains. Charles Marion Russell, the noted Montana western artist used both features as background in his paintings of Montana.
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