This ecosystem services valuation was the first comprehensive economic analysis of the entire Colorado River Basin, a 249,000 square mile region spanning across mountains, plateaus, and low-lying valleys of the American Southwest. Colorado River Basin ecosystems provide a suite of ecosystem services that includes water supply, flood risk reduction, and recreation. The analysis highlighted the importance of engaging water utilities stakeholders, as the Basin's ecosystems provide between $56.5 billion and $466.5 billion in economic benefits every year.