Detailed Instructions: Given a text passage, come up with an appropriate title for it. The title should accurately represent what the main focus of the passage is. The title of a passage may be present in the first few sentences of the passage and/or be referred to multiple times in the passage. The title should be 1-5 words long.
Q: The Mississippi River has the world 's fourth - largest drainage basin ( '' watershed '' or '' catchment '' ) . The basin covers more than 1,245,000 square miles ( 3,220,000 km ) , including all or parts of 31 U.S. states and two Canadian provinces . The drainage basin empties into the Gulf of Mexico , part of the Atlantic Ocean . The total catchment of the Mississippi River covers nearly 40 % of the landmass of the continental United States . The highest point within the watershed is also the highest point of the Rocky Mountains , Mount Elbert at 14,440 feet ( 4,400 m ) .
A:
Mississippi River