Mount Rainier
Cascade Range, and Olympic Range. Mt. Rainier is the biggest mountain, Mt. St. Helen is really famous and then their's Mt. Baker which is just a mountain. But it's pretty cool I guess
Washington State is in the Pacific Northwest.
They are : The Okanogan highlands, The Coast, The Columbia Plateau, The Cascades, and The Western Lowlands.
Mt. Rainier is the highest mountain in the state of Washington.