Mississippi River drains its water in Gulf of Mexico. Gila river is a tributary of Colorado river and their water drains into Pacific Ocean.

Colorado River, major river of North America, rising in the Rocky Mountains of Colorado, U.S., and fl owing generally west and south for 1,450 miles (2,330 kilometres) into the Gulf of California in north-western Mexico.

The Fraser River is a river within British Columbia, Canada, rising at Fraser Pass near Blackrock Mountain in the Rocky Mountains and flowing for 1,375 kilometres (854 mi), into the Strait of Georgia.

Source: School Atlas