The mission of Restore Hetch Hetchy is to return the Hetch Hetchy Valley in Yosemite National Park to its natural splendor ─ while continuing to meet the water and power needs of all communities that depend on the Tuolumne River. In order for this to occur, the City of San Francisco must agree to drain the Hetch Hetchy reservoir and return the valley to the control of the National Park Service.