Polaris is an unincorporated community in Beaverhead County, Montana, United States. Polaris has a post office with a ZIP code 59746. Polaris lies in the Grasshopper Valley, along the Pioneer Mountain Scenic Byway, southeast of Wisdom. This comm…Polaris is an unincorporated community in Beaverhead County, Montana, United States. Polaris has a post office with a ZIP code 59746. Polaris lies in the Grasshopper Valley, along the Pioneer Mountain Scenic Byway, southeast of Wisdom. This community takes its name from the Polaris Mine, which operated as a silver mine from 1885 until 1922.
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