Cascade Mountains

a range of western mountains. The Cascades run parallel to the Pacific coast from California northward into Alaska. In British Columbia and Alaska the Cascades crowd the Coast Range off into the sea. The line of elevation is marked by a number of mountains of volcanic origin. Wrangel, St. Elias, Logan, Fairweather, Vancouver, Shasta, Tacoma or Rainier, Adams, and Hood are the most noted peaks. The range is cut by river gorges, notably by that of the Columbia. The Great Northern Railway crosses the summit in Washington by means of the Cascade Tunnel. This tunnel is wide enough for a double track and is twenty-one feet six inches high. It is faced with concrete and is 2.6 miles long.