The Tongue River originates in the Bighorn Mountains of north-central Wyoming and flows northeast approximately 250 miles through southeastern Montana before joining the Yellowstone River near Miles City. This picturesque river runs through varied landscapes including the mountains of Wyoming, red shale canyons, the pine hills and buttes of eastern Montana, and open prairie grasslands. The Tongue River Dam near the Wyoming-Montana border creates Tongue River Reservoir, a popular 3,700-acre impoundment that provides excellent fishing opportunities. The river system offers diverse fishing experiences in both moving water and reservoir settings, with multiple fish species inhabiting different sections.