For 10 points, identify this long river in the American Southwest which shares its name with a state and also passes through the Grand Canyon.
The Dolores and Virgin Rivers are tributaries of this larger river, and it flows by the Vermillion Cliffs National Monument. Fort Collins is located to the East of the Poudre Pas Lake, where this river begins. One can go gambling in the casino at Lake Havasu City which lies along this river, while Interstate Highway 10 crosses it near the city of Blythe. The Gila River is a tributary of this river which empties into the Gulf of California, while Lake Powell lies on it due to the creation of the Glen Canyon dam. For 10 points, identify this long river in the American Southwest which shares its name with a state and also passes through the Grand Canyon.
The Dolores and Virgin Rivers are tributaries of this larger river, and it flows by the Vermillion Cliffs National Monument.
Colorado River