Question: Boyd County, Kentucky is located in what mountain range?
Context: Ashland is a home rule-class city in Boyd County, Kentucky, in the United States.  Ashland, the largest city in Boyd County, is located upon the southern bank of the Ohio River.  The population was 21,684 at the 2010 census.  Ashland is a part of the Huntington-Ashland metropolitan area; with a population of 363,000.  Ashland is the second-largest city within the MSA, after Huntington, West Virginia.  Ashland serves as an important economic and medical center for northeast Kentucky and is part of the fifth-largest metropolitan area in Kentucky. James C. Klotter is an American historian who has served as the State Historian of Kentucky since 1980.  Klotter also is a history professor at Georgetown College and one of the co-authors of Kentucky's staple history book "A New History of Kentucky".  Klotter received a Ph.D. in History from the University of Kentucky, and he has been awarded honorary degrees from Eastern Kentucky University and Union College.  Klotter was the Executive Director of the Kentucky Historical Society for many years, and he was an associate editor of the Kentucky Encyclopedia.  In 2015, the Boyd County High School chapter of the Rho Kappa National Social Studies Honor Society was named in his honor.  Today Klotter lives with his wife in Lexington, Kentucky. The Elkhead Mountains are a mountain range in Colorado.  The mountain range is considered to be low altitude within Colorado as the mountains are under 11000 ft .  Located within Routt and Moffat counties, the mountain range is far from metropolitan areas and has few lakes and streams, so it attracts few visitors.  The mountain range is a volcanic range and all of the peaks were formed by volcanic action.  The mountain range extends approximately 16 mi east to west and 10 mi north to south, and its center is located at , approximately 20 mi northeast of Craig and north of Hayden, Colorado 13 mi south of the Wyoming border.  Almost all of the peaks within the Elkhead Mountains are a part of Routt National Forest.  Significant peaks are: Bears Ears, Sugar Loaf, Saddle Mountain, Black Mountain, Pilot Knob, and Meaden Peak. Boyd County Public Schools is a school district based in Boyd County, Kentucky.  The district serves the area within the city limits of Catlettsburg and the rest of Boyd County, excluding the areas within the city of Ashland and the census-designated place of Westwood, each of which have their own school districts. The Pinal Mountains (Yavapai: Walkame) are a mountain range located in Gila County, Arizona.  They have a maximum elevation of 7,848 ft at Pinal Peak and a prominence of over 4,000 ft .  The closest city is the Globe, Arizona/Miami, Arizona area, which is just a few miles north of the mountain range.  The mountains are located within the Tonto National Forest, and their recreational facilities are maintained by the USDA's United States Forest Service.  The San Carlos Indian Reservation is very close to the mountain range, with its boundaries being just a few miles east/northeast of the range.  The mountains are covered with Ponderosa Pine and white fir and experience cooler weather than the Globe/Miami area, so that they are a popular recreation area in the summer.  The maintained facilities include a maintained dirt road that goes all the way to the summit of Pinal Peak, a campsite and recreational area, many hiking trails, as well as some radio towers near both Pinal and Signal peaks ( the two highest peaks of the range ).  The mountain range covers an area of 45,760 acres. Linn Boyd (November 22, 1800 – December 17, 1859) (also spelled "Lynn") was a prominent US politician of the 1840s and 1850s, and served as Speaker of the United States House of Representatives from 1851 to 1855.  Boyd was elected to the House as a Democrat from Kentucky from 1835 to 1837 and again from 1839 to 1855, serving seven terms in the House.  Boyd County, Kentucky is named in his honor. Boyd County High School is a public high school located in Cannonsburg, Kentucky, an unincorporated community served by the Ashland post office.  It is part of the Boyd County Public School System. Qaflankuh or Qaflankuh Mountain Range (Persian: رشته کوه‌ها‌ی قافلانکوه / Reshteh Kuh-hā-ye Qāflānkuh) is a mountain range that is located about 20 kilometres north of the city of Zanjan in Zanjan Province, Iran.  With an average width of almost 20 kilometres and a length of about 100 kilometres, this mountain range is stretched in a northwest-southeast direction, beginning from northwest of Zanjan, passing north of Zanjan and ending southeast of Zanjan.  The Qezel Owzan River flows in a valley that separates Qaflankuh Mountains on the south from Talish Mountains on the north.  With an elevation of 2971 metres, Mount Sendan Dagh is the highest mountain of the range which is located in the southeast section of this mountain range.  There are some mineral hot springs containing sulphur in different parts of this range.  Geologically, Qaflankuh Mountain Range was formed during the Tertiary volcanism and plutonism and is made mainly of the Eocene volcanic rocks with very small sections of intrusive rocks in the northern and southern parts of the range. Boyd County is a county located in the U.S. state of Kentucky.  As of the 2010 census, the population was 49,542.  The county seat is Catlettsburg, and its largest city is Ashland.  The county was formed in 1860.  Its 160 sqmi are found at the northeastern edge of the state near the Ohio River and Big Sandy River, nestled in the verdant rolling hills of Appalachia. Appalachia ( ) is a cultural region in the Eastern United States that stretches from the Southern Tier of New York to northern Alabama, Mississippi and Georgia.  While the Appalachian Mountains stretch from Belle Isle (Newfoundland and Labrador) in Canada to Cheaha Mountain in Alabama, the cultural region of Appalachia typically refers only to the central and southern portions of the range.  As of the 2010 United States Census, the region was home to approximately 25 million people.
Answer: Appalachian Mountains