Question: What is the name of the ghost town, home to only a single active residence, located about 20 miles south-southwest of Helena, Montana?

 As of the 2010 census the population at 28,190, making it the fifth least populous state capital in the U.S.  It was founded as a gold camp during the Montana gold rush, and was established in 1864.  Over $3.6 billion of gold was extracted in the city limits over a duration of two decades, making it one of the wealthiest cities in the United States by the late nineteenth century.  The concentration of wealth contributed to the city's prominent, elaborate Victorian architecture. Helena is the capital city of the U.S. state of Montana and the county seat of Lewis and Clark County. <SEP> Ghost Town (sometimes spelled Ghosttown) is the informal name of the Foster Hoover Historic District neighborhood in West Oakland, Oakland, California.  The community is known for its violence and blight .  Some people believe the name originates from a drug king pin who referred to the area as a ghost town due to the shortage of other drug dealers whose absence was attributed to the king pin's dominance over the area.  Others believe it derives from the two former casket companies located side by side on Filbert Street between 30th and 32nd Streets, while others claim that the presence of ghostly white people in an historically black neighborhood gave it its name.  Ghost Town stretches from 27th Street to 35th Street in the area immediately southwest of the MacArthur Maze.  Others see the neighborhood bounded by Adeline on the West and San Pablo on the East.  Ghost Town Farms, one of the more successful expressions of urban agriculture activity in Oakland is located in the heart of the district at 2727 Martin Luther King Jr.  Way, between 27th and 28th Streets.  The area is also one of Oakland's many open-air art galleries, with exceptional muralist work continually on exhibition, particularly along Martin Luther King Jr.  Way.  This neighborhood has an active citizen crime patrol, including one group of seniors who walk the neighborhood weekly to get physical exercise and report blight.  Jerry Brown, governor of California and former Mayor of Oakland stated: "Instead of an omnibus crime bill, you have to deal with shootings in Ghost Town in West Oakland and sideshows in East Oakland."  Brown made attempts to turn around the blighted West Oakland neighborhood after "60 Minutes" featured it in a television profile.  Housing prices have increased.  So has drug dealing, especially since nearby parks were closed by the City of Oakland.  Prostitution, in 2015, has been on the decline for at least a decade. <SEP> Ghost Town Village (formerly "Ghost Town in the Sky) is a Wild West-themed amusement park in Maggie Valley, North Carolina, United States that is currently on hiatus.  An unusual aspect of this park is that it is located atop a mountain which can only be accessed by visitors via a 3370 ft chair lift or an inclined funicular railway.  These start at the parking area beside Jonathan Creek at an elevation of 3150 ft , climbing to the lower level of the park at 4400 ft , a climb of 1250 ft .  The recreated "Ghost Town" sits at 4600 ft , with the highest elevation in the park being about 4650 ft .  The park is located on a ridge extending from Buck Mountain border, an extension of the Cataloochee Divide, to the Great Smoky Mountains National Park.  The park's entrance is located on U.S. Highway 19, the main road through the town.  Ghost Town is promoted as "North Carolina's mile-high theme park." <SEP>  It is reached by following High Ore Road north from Interstate 15.  The remains of the town cover about thirty-five acres and consist of an ore hopper, a large ore processing building, several other company buildings, and numerous houses and other private structures.  High Ore Creek runs through the center of the property and separates the mine buildings from the town proper. Comet is a ghost town located about twenty miles (32 kilometers) south-southwest of Helena, Montana, United States.  The town is abandoned except for a single active residence; although it sits on private grazing land, it is open to public access.