Question: The Little River Railroad is a historic class III railroad that operated during the period 1901 to 1939, between Maryville and Elkmont, Elkmont is a region situated in the upper Little River Valley of the Great Smoky Mountains of which county, in the U.S. state of Tennessee?

Context paragraphs:
Little River (Tennessee): Little River is a 60 mi river in Tennessee which drains a 380 sqmi area containing some of the most spectacular scenery in the southeastern United States.  The first 18 mi of the river are all located within the borders of the Great Smoky Mountains National Park.  The remaining 42 mi flow out of the mountains through Blount County to join the Tennessee River at Fort Loudon Lake in Knox County.

Great Smoky Mountains: The Great Smoky Mountains are a mountain range rising along the Tennessee–North Carolina border in the southeastern United States.  They are a subrange of the Appalachian Mountains, and form part of the Blue Ridge Physiographic Province.  The range is sometimes called the Smoky Mountains and the name is commonly shortened to the Smokies.  The Great Smokies are best known as the home of the Great Smoky Mountains National Park, which protects most of the range.  The park was established in 1934, and, with over 9 million visits per year, it is the most-visited national park in the United States.

Great Smoky Mountains Heritage Center: The Great Smoky Mountains Heritage Center is a private non-profit museum located in Townsend, Tennessee, United States, near the city's entrance to the Great Smoky Mountains National Park.  Its mission is to preserve the heritage and culture of the inhabitants of the Great Smoky Mountains, including both the region's Native American inhabitants and the pioneers and residents of the region's Appalachian communities.  The center was organized in the early 2000s, and officially opened in February 2006.

Elkmont, Tennessee: Elkmont is a region situated in the upper Little River Valley of the Great Smoky Mountains of Sevier County, in the U.S. state of Tennessee.  Throughout its history, the valley has been home to a pioneer Appalachian community, a logging town, and a resort community.  Today, Elkmont is home to a large campground, ranger station, and historic district maintained by the Great Smoky Mountains National Park.

Sugarland Mountain Trail: The Sugarland Mountain Trail is an American hiking trail, in the Great Smoky Mountains National Park of Sevier County, Tennessee.  The trail traverses Sugarland Mountain, a massive ridge running perpendicular to the main crest of the Smokies and effectively dividing the park's north-central section from its northwestern section.  Sugarland Mountain is flanked by the deep upper valleys of two of the park's major watersheds— the West Fork of the Little Pigeon River (to the east) and Little River (to the west).  The trail passes through several forest types, including deciduous forest at lower elevations, heaths ("hells") along the mountain's backbone formations, and a stand of Southern Appalachian spruce-fir forest in the upper elevations.  Occasional breaks in the foliage allow for views of Mount Le Conte and Sevier County to the east and Blanket Mountain and the ridges above Elkmont to the west.

Meigs Mountain Trail: The Meigs Mountain Trail is an American hiking trail in the Great Smoky Mountains National Park of Sevier County, Tennessee.  The trail traverses the northern slopes of Meigs Mountain in the northwest section of the park, connecting Jakes Creek in the Elkmont area with Lumber Ridge in the Tremont area.  The Meigs Mountain Trail, when joined with the 4.1 mi Lumber Ridge Trail and the first 0.4 mi of the Jakes Creek Trail, is part of a 10.5 mi continuous path connecting the Appalachian Club section of Elkmont with the Great Smoky Mountains Institute at Tremont.  In the early 20th century, the logging communities that formed at Elkmont and Tremont branched out across the relatively broad northern slopes of Meigs Mountain.  Other than a crude mountain cemetery, the occasional detritus, and a few rock walls, however, very little remains of the mountain's former inhabitants.

Chilhowee Mountain: Chilhowee Mountain is a low ridge at the outer edge of the Great Smoky Mountains that stretches between the Little Tennessee River (specifically Chilhowee Lake) to the west and the Little Pigeon River watershed to the east.  While not part of the Great Smoky Mountains National Park, the mountain's crest is traversed by the westernmost section of Foothills Parkway.

Little Greenbrier (Great Smoky Mountains): Little Greenbrier is the name of a former Appalachian community that is now an historical area in the Great Smoky Mountains of East Tennessee.  The community was situated in a hollow rising from Metcalf Bottoms along Little River to the upper slopes of Cove Mountain, in the northeastern section of the national park.  Little Greenbrier was once known simply as "Greenbrier," but the "Little" was added to its name to distinguish it from the larger Greenbrier located between Mount Le Conte and Mount Guyot to the east.

Belvidere and Delaware River Railway: The Belvidere and Delaware River Railway Company (reporting mark BDRV) is a class III railroad in the United States.  It was formed in 1995 when the Conrail Delaware Secondary was purchased by the Black River Railroad System, which operates several railroad services in western New Jersey and eastern Pennsylvania.  The Black River Railroad System also owns and operates the Black River and Western Railroad.  The Black River and Western Railroad leases 10 miles of track to the BDRV, since 2004.  The trackage bought was a portion of the former Belvidere-Delaware Railroad which was controlled by the Pennsylvania Railroad and then the Penn Central.

Little River Railroad (Tennessee): The Little River Railroad is a historic class III railroad that operated between Maryville and Elkmont, Tennessee during the period 1901 to 1939.

Supporting paragraphs: Little River Railroad (Tennessee) Elkmont, Tennessee
Answer: Sevier County