How long does it take water to travel the Missouri River?

The time it takes for water to travel the Missouri River can vary significantly based on factors like flow rate and water conditions. On average, the river's flow rate is about 3 to 5 miles per hour. Therefore, it can take approximately 30 to 60 days for water to travel the entire length of the river, which spans about 2,341 miles from its source to its confluence with the Mississippi River.