The Clarks Fork Yellowstone watershed (HUC 10070006) is located in Wyoming and Montana and covers an area of approximately 4,500 square miles. The hydrology of the watershed is dominated by snowmelt and the river is fed by numerous streams and tributaries. The area receives a high amount of snowfall, with specific snowpack measurements often exceeding 100 inches. Surface water in the watershed is primarily used for irrigation, and the area is home to several reservoirs. The primary constituents of these reservoirs are sediment and various nutrients. Interesting climatic facts include the prevalence of chinook winds, which can cause rapid temperature changes and significant snowmelt, and the tendency for the area to experience both droughts and floods. In recent years, there has been a trend towards earlier snowmelt and warmer temperatures.