Mount Rainier National Park is located in the western Washington State about 70 miles southeast of Seattle. Established in 1899, it includes more than 235000 acres. Mt rainier national park itself is 14410 feet high, making it the fifth highest mountain in the Lower 48. It’s considered an active volcano and is part of the Cascade Range of volcanoes. Traveling the park can take you through lowland forests of old growth timber, meadows filled with the wildflowers and the alpine slopes covered in the glaciers.