The Clackamas Watershed is located in northwest Oregon and covers an area of approximately 667 square miles. It is drained by the Clackamas River, which flows into the Willamette River. The climate in the watershed is characterized by mild, wet winters and warm, dry summers. The area receives a significant amount of precipitation throughout the year, which contributes to high streamflows during the winter months. Snowpack in the watershed is important for water supply during the dry summer months, and is typically at its highest in March. The Clackamas River supports a variety of fish species, including Chinook and coho salmon, steelhead, and cutthroat trout. Reservoirs in the watershed are used for hydroelectric power generation, water supply, and recreation. A notable climatic trend in the area is an increase in winter precipitation in recent decades, likely due to climate change.