Silver Bow County, Montana
- is located about 4-5 miles west of Butte. It became populated
because of the Bluebird Mine, but as the mine shut down in 1893, Rocker
became almost non-existent. However, it began to grow again when the
Butte, Anaconda, and Pacific Railroad between Butte and the Anaconda
smelter chose it as its division.
The post office opened in 1887 under Charles Carvey. It closed in 1896 and opened again in 1901 to 1909 and yet again, opened in 1917-1919 The mining camp was named for a cradle-like machine called a rocker which was used by miners to wash gold from the gravel.