The Redwood Watershed (HUC 07020006) spans an area of approximately 2,660 square miles in northwest California. The region is characterized by steep terrain and a Mediterranean climate, with heavy winter rainfall and dry summers. The watershed is primarily fed by rainfall, with peak flows occurring in the winter and spring months. Snowpack is not a significant contributor to the hydrology in the area. Surface water in the watershed is used for a variety of purposes, including agriculture, municipal water supply, and recreation. Major reservoirs in the region include Lake Pillsbury and Lake Mendocino. Water quality in the watershed is generally good, but there are concerns about sediment and nutrient runoff from agricultural operations. The Redwood Watershed is notable for its impressive stands of old-growth redwood trees, which can live for over 2,000 years. Climate change is expected to have significant impacts on the region, with projected changes including higher temperatures, decreased rainfall, and more frequent and severe droughts.