What is the primary mountain range in the United States?

The Rocky Mountains are the primary mountain range in the United States, stretching from Canada down through several states including Idaho, Montana, Wyoming, Colorado, and New Mexico. This extensive range is characterized by its high peaks, deep valleys, and significant biodiversity, making it a prominent feature of the North American landscape. The Rocky Mountains are not only pivotal from a geographical perspective but also play a crucial role in the climate and ecology of the region.

While the Sierra Nevada and the Appalachian Mountains are important mountain ranges in the United States, they are not as extensive or as dominant as the Rocky Mountains. The Sierra Nevada primarily runs along the eastern edge of California, and the Appalachian Mountains, while they have historical importance and distinct cultural significance, mainly extend from the Canadian border down to Alabama and do not match the scale or prominence of the Rockies. The Atlas Mountains, on the other hand, are located in North Africa and are not relevant to the mountain range geography of the United States.