Stillwater County in the foothills of the Beartooths boasts the 'most scenic route to Yellowstone Park' via MT 78 and US 212 over Beartooth Pass. The confluence of the Stillwater and Yellowstone rivers, offer plenty of outdoor recreation. Visit the Museum of the Beartooths (406-322-4588) for an understanding of area history, including artifacts of the Rosebud River Crow Indians, Northern Pacific railroad memorabilia and World War II history. Seasonal. Look for the red Northern Pacific caboose at the corner of 5th and 5th North. Stillwater County from the mountains to the prairies, we have it all. Located in south central Montana, Stillwater County features the Beartooth Absaroka Wilderness area in the southern end, the Stillwater and Yellowstone River Valleys in the central section and the lake basins, coulees and valley plain at the northern end. Stillwater County has it all.