The upper white watershed (HUC 10140201) covers an area of 1,154 square miles in eastern Oregon. The hydrology of the area is dominated by snowmelt in the spring, with the majority of surface water coming from snowpack in the Blue Mountains. The region receives an average of 56 inches of snowfall annually, with a peak snowpack depth of around 60 inches. The surface water in the area is largely used for irrigation and agriculture, with the largest reservoir being the McKay Reservoir. The watershed is also home to a variety of fish species, including Chinook and Steelhead salmon. In terms of climatic trends, the area has experienced a decrease in snowpack and earlier snowmelt in recent years, likely due to climate change. This has implications for water availability and management in the region.