This learning resource explores the role of Coastal Redwood trees in the water cycle, specifically focusing on transpiration and runoff. Students will engage in various activities that illustrate how these majestic trees transport water from the ground through their trunks to the atmosphere, releasing it as vapor. The resource covers the significant daily water intake of a Redwood tree, definitions of key terms, and scenarios that prompt students to think critically about the environmental impact of removing these trees. Overall, it provides a comprehensive understanding of how Redwood trees contribute to the health of the forest ecosystem through their water management processes.