The Yellowstone River, originating in the Absaroka Range in Wyoming, meanders through Montana before joining the Missouri River.

Known for its stunning natural beauty, it stretches over 692 miles, making it the longest undammed river in the contiguous United States. This pristine river supports a diverse ecosystem, including trout, making it a prime destination for fishing enthusiasts. The Yellowstone River also plays a crucial role in the local agriculture and recreational activities, such as rafting and kayaking. Its scenic landscapes and vibrant wildlife attract tourists, contributing significantly to the region's economy and cultural heritage.