The Yellowstone River rises on the continental divide near Younts Peak in Wyoming's Teton Wilderness. It flows <answer>north</answer> through Yellowstone National Park, enters Montana near Gardiner, and passes through the Paradise Valley to Livingston. It then flows <answer>north</answer>easterly across the state through Billings, Miles City, Glendive, and Sidney. The Yellowstone joins the Missouri in North Dakota just east of Fort Union. It is the longest undammed, free-flowing river in the contiguous United States, and drains about a quarter of Montana (36,000 square miles (93,000 km2)).
Which direction does the Yellowstone River flow through the national park?
north