Facts from Wikipedia: Mount Rainier is the highest mountain of the Cascade Range of the Pacific Northwest, and the highest mountain in the state of Washington. It is a large active stratovolcano located 54 miles (87 km) south-southeast of Seattle, in the Mount Rainier National Park. It is the most topographically prominent mountain in the contiguous United States and the Cascade Volcanic Arc, with a summit elevation of 14,411 ft.