A "Fourteener" is a mountain peak that rises at least 14,000 feet (4,267 meters) above sea level. These peaks are primarily found in the western United States, especially in the Rocky Mountains. Climbing a fourteener is a popular activity for hikers and mountaineers, offering stunning views and challenging terrain. In the United States, there are 58 recognized fourteeners, with Mount Elbert in Colorado being the highest at 14,440 feet (4,401 meters). Climbing these mountains often requires physical fitness, proper gear, and knowledge of altitude effects, making them a rewarding experience for outdoor enthusiasts.