Volcanoes usually create single mountains. However, the islands of Hawaii are an example of a mountain range of volcanoes. Some are still active. Most are not. The Cascade Mountain Range runs from Canada down to northern California. They are in the ring of fire. That means there are several volcanoes in this mountain range. Mt. St. Helens is the last to have a major eruption - 1980.

The Himalaya mountain system is the planet's highest and home to all fourteen of the world's highest peaks

The Himalaya stretches across five nations, Bhutan, China, India, Nepal, and Pakistan. It is the source of three of the world's major river systems, the Indus Basin, the Ganga-Brahmaputra Basin and the Yangtze Basin.

The Olympic Mountains in Washington State are not that high. However, the Olympics face the Pacific Ocean and are the wettest place in the 48 contiguous states. (Alaska and Hawaii are not contiguous states because they do not touch any other state.)