The Lower Rogue Watershed (HUC 17100310) covers an area of approximately 1,535 square miles in southwestern Oregon. Its hydrology is characterized by a Mediterranean climate with wet winters and dry summers. The watershed receives most of its precipitation in the winter, with some snowfall in the higher elevations. The specific snowpack varies each year, but it generally contributes to the spring and summer flow of the Rogue River. Surface water in the watershed is primarily composed of the Rogue River and its tributaries. There are several reservoirs in the watershed, including Lost Creek Lake and Applegate Reservoir. These reservoirs provide hydroelectric power, irrigation, and recreation opportunities. Interesting climatic facts and trends include an increase in average annual temperature over the past century, with more warm nights and fewer cold days. Precipitation has also become more variable, with longer dry spells in the summer. Overall, these changes in climate are likely to have significant impacts on the ecosystem and water resources of the Lower Rogue Watershed.