The Yellowstone River is roughly 700 miles long. It begins in Northwestern Wyoming, coming off the continental divide where the South and North fork of the river meet. After draining out of Yellowstone Lake it flows North through Yellowstone National Park. It continues North out of the park, through Gardiner all the way to Livingston. This is the most beautiful portion of the Yellowstone River in my opinion. It descends out of the park, meandering between the Absaroka and Gallatin Mountain Ranges through Paradise Valley. Here you can find awesome whitewater rafting through the town of Gardiner and Yankee Jim Canyon, as well as some of the best fly fishing in the country. From Livingston, the Yellowstone River breaks east towards Billings, MT across the Great Plains. After its long journey and the addition of four tributaries; the Yellowstone River merges with the Missouri River in North Dakota. From there all of this water will eventually find its way to the Gulf of Mexico. The Yellowstone River is the last free flowing river in the lower 48. This means the river does not have a dam and is flowing in its natural state unobstructed by man. This supports ecological function, natural resources, tourism and many other environmental services. As so many rivers in the world are being dammed it is crucial that we preserve and protect rivers like the Yellowstone.