The Snake Headwaters Watershed (HUC 17040101) spans across approximately 8,824 square miles in Wyoming and Montana. The majority of the watershed is covered by mountain ranges, and snowpack is a critical component of the hydrological cycle. The Snake River is the main surface water feature, which flows to the Columbia River Basin. The watershed also includes several reservoirs for water storage and management. Interesting climatic facts include the high variability in precipitation throughout the year, with the majority of precipitation occurring during the winter months. Snowpack plays a critical role in water supply, with the largest snowpack typically occurring in early April. Climate trends in the watershed include an increase in temperature and a decrease in snowpack, which could impact water availability for various uses in the future.