The term "49er" primarily refers to the prospectors who flocked to California during the California Gold Rush of 1849. These individuals sought fortune by mining gold, which was discovered at Sutter's Mill in 1848. The influx of people, known as 49ers, significantly impacted California's population and economy, leading to its rapid growth. Additionally, "49er" is also associated with the San Francisco 49ers, a professional American football team established in 1946. The team is part of the National Football League (NFL) and has a rich history, including multiple championships and a dedicated fan base.