Nevada City is an unincorporated community in Madison County, Montana, United States. In the 1860s, it was one of two centers of commerce in what was known as one of the richest gold strikes in the Rocky Mountain West, along with its sister city Virginia City. As the gold played out and prospectors moved away, Nevada City gradually bec…Nevada City is an unincorporated community in Madison County, Montana, United States. In the 1860s, it was one of two centers of commerce in what was known as one of the richest gold strikes in the Rocky Mountain West, along with its sister city Virginia City. As the gold played out and prospectors moved away, Nevada City gradually became a ghost town. Since the late 1950s, Nevada City has become a tourist attraction for its collection of nineteenth-century buildings within or surrounding the Nevada City Museum and Music Hall.