Northwest, northwestern United States - the northwestern region of the United States

Mount Saint Helens, Mount St. Helens, Mt. St. Helens - an active volcano in the Cascade Range in southwestern Washington; erupted violently in 1980 after 123 years of inactivity

Mount Adams, Adams - a mountain peak in southwestern Washington in the Cascade Range (12,307 feet high)

Coast Mountains, Coast Range - a string of mountain ranges along the Pacific coast of North America from southeastern Alaska to Lower California

chain of mountains, mountain chain, mountain range, range of mountains, range, chain - a series of hills or mountains; "the valley was between two ranges of hills"; "the plains lay just beyond the mountain range"

Mount Ranier, Mount Tacoma, Mt. Ranier, Ranier - a mountain peak in central Washington; highest peak in the Cascade Range; (14,410 feet high)