Simplify the following text for a Grade 10 native English-speaking person.
Original: It includes both non-volcanic mountains , such as the North Cascades , and the notable volcanoes known as the High Cascades . The small part of the range in British Columbia is locally called the `` Coastal Mountains '' but is also known as the Canadian Cascades or Cascade Mountains ; the latter term is also sometimes used by Washington residents to refer to the Washington section of the Cascades in addition to North Cascades , the more usual American term , as in North Cascades National Park .
Simplified: It has other names such as the Cascade Mountains , the High Cascades , and in British Columbia , the Canadian Cascades .