Cascade Range (Cascade Mountains) are a mountain range stretching across California, Washington, Oregon, and southern British Columbia. In the high parts of the mountain there are several snow-covered volcanic peaks. The most prominent - St Helens erupted vigorously in the 1980s, sweeping the forests along the slope and burying the northern regions of the United States with volcanic ash. Since 1980, the volcano has been declared a national monument to preserve the area and enable scientists to observe undisturbed this natural phenomenon. The mountain range also includes many landmarks that are not volcanic. Mount Hood, the gorge of Kolumbia and the Crater Lake are just some of them. Millions of tourists visit this place to go canoe and climb in summer and ski in the winter.