Yellowstone National Park is the birthplace of two of the three rivers that become the Missouri River further east. Name these two rivers.

The Gallatin River starts all the way up in the northwest corner of the park and flows through the Gallatin National and then joins the Jefferson and Madison Rivers not too far from Bozeman, Montana. Near Three Forks, Montana, these three rivers form the Missouri.

Asked by Tom Cohen · Last updated 5 years ago · 1.5K views