The Lower Bighorn Watershed (HUC 10080015) spans an area of approximately 1,738 square miles in Montana and Wyoming. The watershed is home to the Bighorn River, which is fed by snowpack and rainfall runoff in the Absaroka Mountains. The area receives an average of 50-60 inches of snow each year, with the snowpack accumulating from November through April. The Bighorn River provides a critical source of surface water for agriculture, industry, and wildlife habitat. The river also sustains several reservoirs, including Boysen Reservoir in Wyoming and Yellowtail Reservoir in Montana. The watershed experiences a semi-arid climate with hot summers and cold winters. Climate change is expected to impact the snowpack, runoff, and water availability in the watershed, leading to potential impacts on agriculture, wildlife, and recreational activities.