Clean water is a vital part of ecosystems and communities everywhere. Yosemite National Park protects two major river watersheds, 3,200 lakes, 1,700 miles of streams and creeks, and two reservoirs. This gives the plants and animals that live in the park pristine water upon which to build their ecosystems, park visitors scenic vistas and recreation opportunities to enjoy, and millions of people living outside the park access to clean drinking water. Clean water in and from Yosemite National Park