The Lemhi Watershed (HUC 17060204) spans across approximately 1,615 square miles in eastern Idaho and western Montana. The area is characterized by high-elevation mountains, valleys, and plateaus. The watershed is fed by both snowmelt and precipitation, with snowpack accumulation typically occurring from November to April. The Lemhi River is the major surface water source in the watershed, with several small reservoirs and irrigation canals also present. The reservoirs primarily store water for irrigation purposes. Interesting climatic facts include the fact that the Lemhi Watershed is considered a semi-arid region, with average annual precipitation ranging from 12-20 inches. Trends suggest that climate change may lead to reduced snowpack accumulation and earlier snowmelt, impacting water availability in the watershed. Additionally, increasing temperatures may contribute to more frequent and severe wildfires in the area.