The Western United States, often referred to as the West, includes states like California, Oregon, Washington, Nevada, and Colorado. This region is known for its diverse geography, featuring mountains, deserts, and coastlines. The Rocky Mountains and the Sierra Nevada are prominent mountain ranges, while the Pacific Ocean borders the western edge. The climate in the Western United States varies significantly, ranging from the arid conditions of the Great Basin to the temperate rainforests of the Pacific Northwest. Major cities in this region include Los Angeles, San Francisco, and Seattle, each contributing to the cultural and economic landscape of the area.