The Bighorn River is a renowned world-class tailwater fishery spanning both Montana and Wyoming. Originating in Wyoming where it flows as the Wind River before becoming the Bighorn, the river gains special status once it passes through Yellowtail Dam in Montana, creating cold, clear, nutrient-rich waters that support an exceptional trout fishery. With a remarkably consistent flow due to dam regulation, the Bighorn maintains ideal temperatures and conditions that support thriving aquatic life year-round. The river's high alkalinity (pH levels 7.4-7.8) creates perfect conditions for freshwater invertebrates, establishing a rich food chain that supports an impressive population of large wild trout, estimated at 2,000-5,000 fish per mile in the most productive sections. This combination of steady flows, abundant insect life, and healthy fish populations has earned the Bighorn its reputation as one of America's premier trout fishing destinations.