National Park, City PlaygroundThe majestic beauty of Mount Rainier, which dominates the Seattle and Tacoma skyscapes, has in many ways defined the Pacific Northwest. At the same time, those two major cities have strongly influenced the development of Rainier as a national park. From the late 1890s, when the Pacific Forest Reserve became Mount Rainier National Park, the evolving relationship between the mountain and its surrounding residents has told a history of the region itself.