Does the Missouri river lead all way into Pacific?

The Missouri River does not lead all the way into the Pacific Ocean. The Missouri River is the longest river in the United States and a major tributary of the Mississippi River. It flows for about 2,341 miles (3,768 km) from its source in the Rocky Mountains in Montana to its confluence with the Mississippi River near St. Louis, Missouri. The Mississippi River then flows into the Gulf of Mexico, not the Pacific Ocean.