Blue Ridge Tunnel – Rockfish Gap, Afton Mountain

The Chesapeake & Ohio (C&O) Railway used the historic Rockfish Gap to cross the Appalachian Mountains, a feat accomplished through the construction of two tunnels. An “air gap” is a low point in a mountain ridge that is not carved by a river, providing a less strenuous passage for the railroad than navigating over the surrounding mountain peaks. Rockfish Gap has an elevation of approximately 1,903 feet, making it a pivotal location for rail and vehicular traffic, including Interstate 64.

The original Blue Ridge Tunnel (1850–1940s)

Engineering Marvel: The C&O’s predecessor, the Blue Ridge Railroad, began construction of the original Blue Ridge Tunnel in 1850 under the direction of French engineer Claudius Crozet. The tunnel, completed in 1858, ran 4,273 feet and was a major engineering accomplishment of its time, becoming the longest railroad tunnel in North America. Its construction was particularly challenging, relying on manual labor, black powder, and brute force to blast through hard greenstone and granite.
Legacy: The tunnel provided a crucial passage through the Blue Ridge Mountains, connecting the eastern part of Virginia with the Shenandoah Valley and playing a vital role in the C&O’s westward expansion.

The second tunnel and modernization (1940s)

As locomotives and freight cars grew larger in the 20th century, the original tunnel’s single-track bore became a bottleneck. To modernize its route, the C&O built a new, wider tunnel just south of the original in the late 1940s, a project that is still used today by the railroad’s successor, CSX Transportation (Buckingham Branch).

The Blue Ridge Tunnel rail trail

The original tunnel, abandoned after the second tunnel’s completion, eventually became a candidate for a rails-to-trails project. After extensive planning and restoration efforts, it reopened as a public trail in 2020. The trail, which is popular with hikers and bikers, now allows visitors to walk through the historic tunnel. A constant breeze and year-round temperature of around 50 degrees Fahrenheit make for a unique and memorable adventure. Interpretive signs describe the tunnel’s history and construction, preserving the story of those who built this engineering marvel.

For More Information – Sources and Resources

The following are excellent resources for those of you wanting to explore and learn more about the history and operation of the Appalachian Railroads. These sources of information also serve as reference and historical materials for Appalachian-Railroads.org. Much of the collective railroad history data points on this website are verified across multiple sources.

Personal Maps & Memorabilia: Documents, maps, timetables, and track charts
Associations, Historical Societies and their Archives
Archives of Appalachia: ETSU, Johnson City TN
Newspaper Articles: Newspapers.com
Magazines/Online: ‘Trains‘, ‘Classic Trains‘
Books
- Drury: The Historical Guide to North American Railroads
- Appalachian Region
  - Grant: ‘The Louisville, Cincinnati & Charleston Rail Road’
  - Graybeal: ‘The Railroads of Johnson City
  - Huddleston: ‘Appalachian Crossings – The Pocahontas Roads‘ and ‘Appalachian Conquest‘
  - Poole: ‘A History of Railroading in Western North Carolina‘
  - Timko and Young: ‘Appalchian Coal Mines and Railroads, Vol. 1, 2, & 3‘
  - Roberts: ‘Sand Patch, Clash of the Titans‘
  - Yanosey: ‘Tidewater Triangle’
- Atlantic Coast Line Railroad
  - Calloway: ‘Atlantic Coast Line, The Diesel Years‘
  - Griffin: ‘Atlantic Coast Line, The Standard Railroad of the South‘
  - Goolsby: ‘Atlantic Coast Line Passenger Service, The Postwar Years‘
- Baltimore & Ohio Railway
  - Jacobs: ‘The History of the Baltimore & Ohio’
  - McGuirk: ‘Baltimore & Ohio Railroad in the Potomac Valley‘
  - Ori, Salamon and Oroszi: Baltimore & Ohio/Reflections of the Capitol Dome‘ and ‘Baltimore & Ohio/Sunburst Trail to Chicago’
- C&O Railway/Chessie System
  - Dixon: ‘Chesapeake & Ohio, Superpower to Diesels‘, Chesapeake & Ohio in the Coalfields, ‘C&O Allegheny Subdivision‘, and ‘Chesapeake & Ohio Railway – A Concise History and Fact Book‘, and ‘The Chessie Era’
  - Dorin: ‘The Chesapeake & Ohio Railway’
  - Huddleston: ‘Riding the New River Train‘
  - Ori – ‘Chessie System‘
  - Paton: ‘Allegheny with an A’
  - Turner: ‘Chessie’s Road‘
- Clinchfield Railroad
  - Beach: ‘The Black Mountain Railway’
  - Goforth: ‘Building the Clinchfield‘ and ‘When Steam Ran the Clinchfield‘
  - Helm: ‘The Clinchfield Railroad in the Coal Fields‘
  - Irwin & Stahl: ‘The Last Empire Builder: The Life of George L. Carter‘
  - King: ‘Clinchfield Country‘
  - Marsh: ‘Clinchfield in Color‘
  - Poteat & Taylor: ‘The CSX Clinchfield Route in the 21st Century‘
  - Stevens & Peoples: ‘The Clinchfield No. 1 – Tennessee’s Legendary Steam Engine‘
  - Way: ‘The Clinchfield Railroad, the Story of a Trade Route Across the Blue Ridge Mountains‘
- CSX Railroad
  - Springirth: ‘CSX Transportation Heritage‘
- ET&WNC: Listed on the website’s ET&WNC pages
- Interstate Railroad
  - Wolfe & Wolfe: ‘Appalachian Coal Hauler’
  - Wolfe: ‘The Interstate Railroad‘
- L&N Railroad
  - Castner, Flanary & Dorin: Louisville & Nashville Railroad The Old Reliable‘
  - Flanary: The Louisville & Nashville Cumberland Valley Division
  - Flanary, Oroszi & McKee: ‘The Louisville & Nashville in the Appalachians‘
  - Oroszi & Flanary: ‘Dixie Lines, The Louisville & Nashville Railroad‘
- NC&StL Railway
  - Prince: ‘Nashville Chattanooga & St Louis Railway‘
- Norfolk Southern
  - Esposito: ‘Norfolk Southern Railroad’
  - Lindsey: ‘Norfolk Southern 1995 Review‘
- Norfolk & Western Railway
  - Newton: ‘Rails Remembered, Volumes 1-6
  - Warden: ‘Norfolk & Western: Diesel’s Last Conquest‘ and ‘Norfolk & Western’s Passenger Service’
  - Wolfe, Wilson & Mandelkern: ‘Norfolk & Western’s Clinch Valley Line‘
- Pennsylvania Railroad
  - Jacobs: ‘The History of the Pennsylvania Railroad‘
- Seaboard Air Line, Seaboard Coast Line, Seaboard System
  - Calloway and Withers: ‘Seaboard Motive Power‘
  - Carleton: ‘Locomotives of the Seaboard System‘
  - Griffin: ‘Seaboard Coast Line and Family Lines Railroad‘ and ‘All Lines North of Raleigh‘
  - Johnson: ‘Through the Heart of the South‘
- Southern Railway
  - Davis: The Southern Railway, Road of the Innovators‘
  - Flanary, Lindsey & Oroszi. The Southern Railway‘
  - Webb: ‘The Southern Railway System: An Illustrated History‘
  - Wolfe: ‘Southern Railway Appalachia Division‘
- Virginian Railway
  - Reisweber: ‘Virginian Rails’
  - Wiley & Wallace: ‘The Virginian Railway Handbook‘
Online Article: Flanary: ‘The Quick Service Route, The Clinchfield Railroad‘; Scientific American: ‘The Costliest Railroad in America‘
Online Videos: Ken Marsh on Kingsport area railroads and region’s history Video #1 | Video #2:
Websites:
- American-Rails.com
- AppalachianRailroadModeling.com
- Carolana.com – North Carolina Railroads, South Carolina Railroads
- Diesel Shop
- HawkinsRails.net
- Multimodalways
- StateOfFranklin.net which hosts Johnson’s Depot
- RailFanGuides.us for Johnson City and for Erwin
- SteamLocomotive.com
- VirginiaPlaces.org – Railroad History of Virginia
- Wikipedia.org
- WvncRails.org – North Carolina and West Virginia Railroads

3Cs Websites

Appalachian-Railroads.org | Clinchfield.org | Southern-Railroads.org