Rocky Mountains summary

Denver, city and county, capital of Colorado, U.S., at the western edge of the Great Plains, just east of the Front Range of the Rocky Mountains. The city and county were consolidated as a single administrative unit in 1902. Denver lies at the junction of Cherry Creek and the South Platte River.

Rio Grande, fifth longest river of North America, and the 20th longest in the world, forming the border between the U.S. state of Texas and Mexico. Rising as a clear, snow-fed mountain stream more than 12,000 feet (3,700 metres) above sea level in the Rocky Mountains, the Rio Grande descends across

Columbia River, largest river flowing into the Pacific Ocean from North America. It is exceeded in discharge on the continent only by the Mississippi, St. Lawrence, and Mackenzie rivers. The Columbia is one of the world’s greatest sources of hydroelectric power and, with its tributaries, represents

Colorado River, major river of North America, rising in the Rocky Mountains of Colorado, U.S., and flowing generally west and south for 1,450 miles (2,330 kilometres) into the Gulf of California in northwestern Mexico. Its drainage basin covers 246,000 square miles (637,000 square kilometres) and