Mountain Pine is a city in Garland County, Arkansas, United States. It is part of the Hot Springs Metropolitan Statistical Area. The population was 770 at the 2010 United States Census. It is located immediately southeast of Lake Ouachita below the Blakely Mountain Dam. The city consists of five defined neighborhoods, Pinewood, South Mountain Pine, a business district, Cozy Acres and Mountain View/Timberland area.Mountain Pine was founded as a company town in the late 1920s by Dierks Lumber and Coal Company, which operated a vast lumber mill on the town's east side. The mill was closed in 2006 by then-owners Weyerhaeuser, and later dismantled.