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The approximately 350 miles (560 km) of the Colorado above the confluence of the Green, including the entire section within Colorado, was known as the Grand River. [2] [3] [4] Below the Green River the Colorado flows through Cataract Canyon, which contains some of its most difficult rapids.
The 277 miles (446 km) of the river that flow through the Grand Canyon are largely encompassed by Grand Canyon National Park and are known for their difficult whitewater, separated by pools that reach up to 110 feet (34 m) in depth. [25]
The Grand Canyon [a] is a steep-sided canyon carved by the Colorado River in Arizona, United States.The Grand Canyon is 277 miles (446 km) long, up to 18 miles (29 km) wide and attains a depth of over a mile (6,093 feet or 1,857 meters).
Havasu Creek is the second largest tributary of the Colorado River in Grand Canyon National Park. [5] The drainage basin for Havasu Creek is about 3,000 square miles (7,800 km 2). It includes the town of Williams, Arizona, and Grand Canyon Village. [6] Havasu Creek starts out above the canyon wall as a small trickle of snow run-off and rain water.
The Grand Canyon section of the Colorado River, like several other big-water Western rivers, uses a rapids scale developed by Otis R. Marston of 1–10 for rapids, 10 being the most difficult. The International Scale of River Difficulty , which classifies rapids from class I to VI, is more common elsewhere in the US and internationally.
Thunder River is a river entirely within the Grand Canyon National Park.It flows southeast from its source near the North Rim of the canyon to Tapeats Creek.The 0.5-mile-long (0.80 km) river is one of the shortest in the United States, [a] and drops approximately 1,200 feet (370 m) over a series of waterfalls, making it the steepest river in the country.
Deer Creek is a stream that flows through the western part of the Grand Canyon, in the U.S. state of Arizona, as a right-bank tributary of the Colorado River. A series of natural springs provide for a perennial flow in Deer Creek. During periods of intense rainfall, Deer Creek can experience severe flash flooding.
Grand Canyon National Park is a national park of the United States located in northwestern Arizona, the 15th site to have been named as a national park.The park's central feature is the Grand Canyon, a gorge of the Colorado River, which is often considered one of the Wonders of the World.