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?
Context: Calico is a ghost town and former mining town in San Bernardino County, California, United States.  Located in the Calico Mountains of the Mojave Desert region of Southern California, it was founded in 1881 as a silver mining town, and today has been converted into a county park named "Calico Ghost Town".  Located off Interstate 15, it lies 3 mi from Barstow and 3 miles from Yermo.  Giant letters spelling "CALICO" can be seen on the Calico Peaks behind the ghost town from the freeway.  Walter Knott purchased Calico in the 1950s, architecturally restoring all but the five remaining original buildings to look as they did in the 1880s.  Calico received California Historical Landmark #782, and in 2005 was proclaimed by then-Governor Arnold Schwarzenegger to be California's Silver Rush Ghost Town. Foster is an unincorporated community in the town of Clear Creek in Eau Claire County, Wisconsin, United States.  It lies approximately 9 miles south-southwest of Fall Creek, 7 miles southeast of Cleghorn, and 6 miles northwest of Osseo.  Located primarily along Eau Claire County Highway "HH", it is flanked on the west by U.S. Highway 53 and on the east by Interstate 94, being the site of I-94's exit #81 in Wisconsin, placing it 11 miles southeast along the freeway from southeastern Eau Claire and 7 miles northwest of Osseo. Cahuilla Creek is a tributary stream of Wilson Creek which is in turn a tributary of Temecula Creek, and the Santa Margarita River in Riverside County, California.  Its mouth is at its confluence with Wilson Creek at an elevation of 2,106 feet / 642 meters.  Its source is at , at an elevation of 5,800 feet, on the west slope of Thomas Mountain 0.6 miles west-southwest of Tool Box Spring.  It flows southwest through the Anza Valley and Cahuilla Valley in the Cahuilla Indian Reservation to Wilson Creek, 7 miles south-southwest of Cahuilla Mountain and 20 miles south-southeast of San Jacinto. Helena is the capital city of the U.S. state of Montana and the county seat of Lewis and Clark County.  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. 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." The Arkansas Hills are a mountain range in Central Colorado located between the upper Arkansas River Valley and the upper South Platte River Valley.  This landmass is a continuation of the ridge known as the Mosquito Range north of Trout Creek Pass.  The range continues for roughly 60 miles south-southwest from Trout Creek Pass to the town of Texas Creek.  Few perennial streams flow out of the Arkansas Hills, as the area is arid.  The range is in the rain shadow of the much higher Sawatch and Sangre de Cristo Ranges to the west across the Arkansas River Valley.  The City of Salida, Colorado is the most notable municipality near the Arkansas Hills.  To the south is the town of Cotopaxi, Colorado.  To the east is the town of Guffey, Colorado.  The highest points in the Arkansas Hills tend to be between 11,000 and 12,000 feet elevation. Comet is a ghost town located about twenty miles (32 kilometers) south-southwest of Helena, Montana, United States.  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.  The town is abandoned except for a single active residence; although it sits on private grazing land, it is open to public access. San Angelo Army Airfield is an inactive United States Air Force base, about 8 miles south-southwest of San Angelo, Texas.  It was active during World War II as a training airfield.  It was closed on 30 November 1945. Canby's Cross is located in Lava Beds National Monument, about 3 miles south of Tule Lake, and 5 miles south-southwest of the town of Tulelake, California.  It was erected to commemorate General Canby's death at a peace gathering.  General Canby was shot in the face by Captain Jack of the Modoc tribe, who was later hanged for the killing.  The cross is registered as a California Historical Landmark. 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.
Answer: Comet