Colorado River

1. River in the southwestern United States, with its headwaters in the Rocky Mountains of northern Colorado , that flows generally southwest through Colorado, Utah , and Arizona ; forms the border between Nevada and Arizona and Arizona and California ; and then flows through Mexico , emptying into the Gulf of California.

Notes

Source of fresh water for communities in Nevada, Arizona, and California.

The site of the Hoover Dam.

Over millions of years, the force of the river has carved the Grand Canyon in northwestern Arizona.