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The Yellowstone River is a tributary of the Missouri River, approximately 671 miles (1,080 km) long, in the Western United States.Considered the principal tributary of upper Missouri, via its own tributaries it drains an area with headwaters across the mountains and high plains of southern Montana and northern Wyoming, and stretching east from the Rocky Mountains in the vicinity of Yellowstone ...
In June 1877, several bands of the Nez Perce, numbering about 750 men, women, and children and resisting relocation from their native lands on the Wallowa River in northeast Oregon to a reservation in west-central Idaho on the Clearwater river, attempted to escape to the east through Idaho, Montana and Wyoming over the Rocky Mountains into the Great Plains.
In fact, it is thought that this was the pass that provided the route for Yellowstone cutthroat trout to migrate from the Snake River (Pacific) to Yellowstone River (Atlantic) drainages. [3] [4] This site received designation as a National Natural Landmark in 1965, bearing the official name of Two Ocean Pass National Natural Landmark.
Powder River is a tributary of the Yellowstone River, approximately 375 miles (604 km) long in northeastern Wyoming and southeastern Montana in the United States. Combined with its tributary, the South Fork Powder River, it is 550 miles long. It drains an area historically known as the Powder River Country on the high plains east of the Bighorn ...
The Raynolds Expedition was a United States Army exploring and mapping expedition intended to map the unexplored territory between Fort Pierre, Dakota Territory and the headwaters of the Yellowstone River. The expedition was led by topographical engineer Captain William F. Raynolds.
Trident is a small, remote plateau in the southeast corner of park in the headwaters of the Yellowstone River east of The Trident. It extends east into the Teton National Forest in Wyoming. The Trident was named by geologist Arnold Hague in 1885 because it resembled a three pronged Trident. [17]
The region has a long history of volcanism; millions of years ago, Columbia River basalts covered vast areas of the western Snake River watershed, while the Snake River Plain was a product of the Yellowstone volcanic hotspot. The river was further altered by catastrophic flooding in the most recent Ice Age, which created such features as the ...
The Clarks Fork of the Yellowstone River (sometimes called the Clark's Fork River) is a tributary of the Yellowstone River, 150 mi (241 km) long in the U.S. states of Montana and Wyoming. [ 3 ] It rises in southern Montana, in the Gallatin National Forest in the Beartooth Mountains , approximately 4 mi (6 km) northeast of Cooke City and ...