The Dead Kelsey Watershed, located in the Sierra Nevada Mountains of California, covers a land area of approximately 44 square miles. It is characterized by a snow-dominated hydrology, with the majority of precipitation falling as snow during the winter months. The specific snowpack in the watershed can vary greatly from year to year, depending on weather conditions. The surface water in the watershed is primarily sourced from snowmelt and contributes to the nearby reservoirs of French Meadows and Hell Hole. The reservoirs contain a mix of sediment, organic matter, and dissolved ions. Interesting climatic facts and trends in the watershed include an overall warming trend in recent years, which has led to a decrease in snowpack and earlier snowmelt. This has resulted in altered streamflow patterns and increased variability in water availability for downstream users.