The Elk Watershed (HUC 11070104) encompasses an area of approximately 1,400 square miles in southwestern Montana. The watershed is predominantly mountainous and is characterized by a complex hydrology system, with numerous streams and rivers that flow into the Yellowstone River. The area receives significant snowfall during the winter months, with the highest snowpack typically occurring in the upper elevations of the watershed. Surface water in the watershed is critical for irrigation and domestic use, with several reservoirs located throughout the area that store water for these purposes. Notably, the watershed has experienced increasing temperatures over the past few decades, which has resulted in a decrease in snowpack and a shift in the timing of streamflow. These trends have significant implications for water availability and management in the Elk Watershed.