The Upper Humboldt Watershed (HUC 16040101) is located in Northeastern Nevada and includes 3,499 square miles of land. The hydrology of the area is dominated by the Humboldt River, which flows through the watershed from south to north for over 100 miles. The region is characterized by a semi-arid climate with low annual precipitation and high evapotranspiration rates. Snowpack in the region is variable, and plays an important role in determining the amount of surface water available for agricultural and other uses. Major reservoirs in the watershed include Rye Patch and Wild Horse Reservoirs, which are used for irrigation, flood control, and hydroelectric power generation. Interesting climatic trends in the region include an overall increase in average temperatures over the past century, as well as increasing variability in precipitation patterns. These changes may have important implications for water management and natural resource conservation in the region.