The North Fork John Day Watershed (HUC 17070202) covers an area of approximately 2,107 square kilometers in northeastern Oregon. The watershed is characterized by diverse topography, ranging from high mountain peaks to low-elevation valleys. The watershed is also known for its unique hydrology, with snowpacks playing a crucial role in maintaining surface water flows throughout the year. The watershed's snowpack is typically highest in the late winter and early spring, with peak snowpacks occurring in March. The watershed also contains several reservoirs that store water for irrigation and other purposes. These reservoirs are typically composed of sediment, organic matter, and nutrients. In terms of climate, the watershed experiences a unique combination of Mediterranean and continental climates, characterized by hot, dry summers and cold, snowy winters. Recent trends in the watershed include declining snowpacks, increasing temperatures, and changes in precipitation patterns.