Bear Chip Coulee, Silver Creek, and Norwegian Gulch along the Yellowstone River in Sweetgrass County, near the Gallatin National Forest, (A Coulee is a deep ravine). This is home to the Greycliff Prairie Dog Town Monument a very small park dedicated to the preservation of these willy little critters.
The Yellowstone River flows through here year round, passing runoff from the rains and snowpack melt in the mountains to the west. The Yellowstone River is a tributary of the Missouri River, approximately 692 miles (1,114 km) long, in the western United States. Considered the principal tributary of the upper Missouri, the river and its tributaries drain a wide area stretching from the Rocky Mountains in the vicinity of the Yellowstone National Park across the mountains and high plains of southern Montana and northern Wyoming.