Boulder is a town in and the county seat of Jefferson County, Montana, United States. It is on the north bank of the Boulder River between Butte and Helena, slightly east of the Continental Divide, at the intersection of Interstate 15 and Montana Highway 69. The population was 1,183 at the 2010 census. It is part of the Helena Micropolitan Statistical Area. Established in the 19th century as a stagecoach station, Boulder grew into a regional trading... Show more

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