The Lower Duck Watershed (HUC 06040003) spans an area of approximately 1,426 square miles, covering parts of northern California and southern Oregon. The hydrology of the watershed is characterized by the Klamath River, which originates in the region and flows through the area before emptying into the Pacific Ocean. The region experiences a significant snowpack, which contributes to the surface water flow and supports local ecosystems. The watershed contains several reservoirs, including the Iron Gate Reservoir, which provides water for irrigation and hydroelectric power generation. Interesting climatic facts include the variation in precipitation patterns, with some areas experiencing up to 100 inches of precipitation annually, while others receive less than 20 inches. The region has also experienced drought conditions in recent years, leading to reduced water availability and increased wildfire risk.