The Two Rivers Watershed (HUC 09020312) spans over 2,400 square miles in central Montana, USA. It encompasses two main rivers, the Judith and Musselshell, as well as numerous smaller streams and tributaries. The hydrology of the watershed is influenced by a semi-arid climate with high variability in precipitation and snowpack. The area experiences significant snow accumulation in the winter, which contributes to spring runoff and streamflow. Surface water in the watershed is used for irrigation, drinking water, and recreation, and is subject to water quality concerns related to sediment and nutrient loading. The watershed also includes several reservoirs, including the Fresno Reservoir, which is a popular fishing and boating destination. Climatic trends in the watershed include decreasing snowpack and earlier snowmelt, which may have implications for water availability and drought risk in the future.