Although Katmai National Park and Preserve (Katmai) is best known for its large populations of brown bears and fish and numerous volcanoes, its nearly 4.2 million acres encompass a vast land of extraordinary rivers, lakes, glaciers, alpine tundra, coastal fjords and bays, marshes, alder thickets and spruce forests, each supporting interdependent communities of species that have adapted well to live in Katmai's harsh climate. Katmai and the Alagnak Wild River contain some of the most spectacular waters in the nation, including the largest freshwater lake in the national park system and one of the longest contiguous coastlines (398 miles). These waters are remarkable for their color, clarity, size and number as well as their phenomenal ability to support large numbers of fish. Katmai's lakes and streams are truly a national treasure deserving of the highest level of protection that can be afforded.