The Methow Watershed (HUC 17020008) is located in the eastern part of Washington state and covers approximately 1,780 square miles. The hydrology of the watershed is dominated by the Methow River, which is fed by the snowpack in the surrounding mountains. The snowpack in the Methow Watershed is particularly important as it is the primary source of water for irrigation and domestic use during the dry summer months. The surface water in the Methow Watershed is home to several species of fish, including Chinook salmon and steelhead trout. However, the watershed has faced several challenges, including the presence of pollutants and the impact of climate change on snowpack and water availability. The watershed is also home to several reservoirs, including the Pearrygin Lake Reservoir, which is used for irrigation and recreation purposes. Interesting climatic facts and trends in the Methow Watershed include the increasing temperatures and decreasing snowpack, which have led to changes in the timing and amount of water availability. These changes have significant implications for agriculture, recreation, and the overall health of the watershed.