The Lower Klamath Watershed (HUC 18010209) is located in northern California and southern Oregon and covers approximately 4,576 square miles. The hydrology of the area is primarily influenced by the Klamath River, which flows through the watershed and supports several species of fish, including salmon and steelhead. The area receives significant snowfall during the winter months, with the snowpack typically peaking in April before melting in the spring and summer. Surface water within the watershed is primarily derived from precipitation and snowmelt, and there are several reservoirs within the area that provide water for irrigation and other uses. Interesting climatic trends include increasing temperatures and decreasing snowpack levels, which have implications for water resources and aquatic ecosystems within the watershed.