The Middle Bear Watershed (HUC 16010202) covers an area of approximately 1,411 square miles in southwestern Montana. The hydrology of the watershed is dominated by the Beaverhead-Deerlodge National Forest, which provides a source of surface water for the region. The watershed is characterized by a high-altitude, cold climate, which results in a specific snowpack that is critical for maintaining water supplies during the dry summer months. The watershed contains several reservoirs that are used for irrigation and hydroelectric power generation, and the water is typically high in dissolved minerals, including calcium and magnesium. Interesting climatic facts include the region's frequent and heavy snowfall events, which have increased in frequency in recent years. There has also been a trend towards warmer temperatures, which could impact both the snowpack and the availability of surface water in the watershed.