Saint Paul, Virginia, is where the old Clinchfield Railroad crosses the old Norfolk & Western's Clinch Valley Branch. At Boody, there is what amounts to a wye with the NS Clinch Valley District, coming west from Bluefield, but at this point heading north directly in line with the ex-Clinchfield’s southerly heading. Both lines turn to the west into St. Paul, where they both cross (MP 42.2) and interconnect (MP 42.5), and there is a north-facing spur at Lumber Track (MP 42.5). On the west side of St. Paul is a similar “wye” at MP42.7, with the NS Clinch Valley District leaving to the northwest, and the ex-Clinchfield leaving to the southwest, single track, CTC, with speed restriction 25 mph.
Leaving St. Paul almost due south, the former Clinchfield line curves 180-degress to the north at Quarry (MP 43.8), where there is a "north"-facing spur, past the dual-ended spur at Castle (MP 44.2), then back to the south again near Burton’s Ford (where the line is again only a couple of hundred yards from the Clinch Valley District west of St. Paul), west, south, west, curvily north, and just south of due west, past, a tunnel, and a detector at Carfax (MP 49.5), turning south at Bangor, to the 8,200 ft. west side siding Miller Yard (MP 53.1, where there is no longer a yard), where an NS line from Norton once trailed in on the west side, then heads west-southwest through a tunnel and turns south-southwest past Dungannon (MP 59.1), where there is a south-facing spur, and then curvily southwest past Hardwood, Wood, and the south-facing spur at Fort Blackmore (MP 64.5), turning south past the dual-ended spur at Starnes Team (MP 68.8) and the 7,268 ft. west side siding at Starnes (MP 69.2), southwest past a tunnel, a slide detector fence from MP 71.5 to MP 71.8, Hill, and another tunnel, a slide detector fence from MP 71.8 to MP 74.0, and west-southwest, past a slide detector fence from MP 74.2 to MP 76.4, and from MP 76.5 to MP 78.9 to two more tunnels in the vicinity of Clinchport.
In the areas between Dungannon (at least) and Copper Creek, the broad valley of the Clinch River has agricultural fields and meadows bordering the river, with deciduous wooded areas on the hillsides bounding the valley. The railroad and the road are sometimes on opposite sides of the valley, and sometimes adjacent.
Near Clinchport, the line turns south across the spectacular Copper Creek Trestle, across a river, where the NS line from Big Stone Gap to Frisco, having run through Natural Tunnel just to the north, runs on a much-lower trestle across the same river, below and just to the west, passes another tunnel, bridges over that NS line, and passes the south-facing spur at Speers Ferry (MP 80.1), a slide detector fence from MP 80.2 to MP 80.3, and a longer tunnel, and turns east past the "south"-facing spur at Kermit Team (MP 81.9), the 7,330 ft. east-side siding at Kermit (MP 82.2), south and east again past a slide detector fence from MP 84.9 to MP 85.4, and a detector at Wininger (MP 85.5), south across the Tennessee state line, east past Waycross (MP 87.0), where there is a connector on the north side to the parallel NS line, which here is running orthogonal to the Clinchfield line, and the dual-ended spur at Waycross Storage (MP 87.1), to reach Frisco, TN (MP 88.2), just south of the state line, where there is another interconnection with the former Southern Railway (now NS) line south from Big Stone Gap, through Natural Tunnel, that continues many miles southwestward from Frisco.
The former Clinchfield continues southeast through Kingsport, where it serves the huge Tennessee Eastman chemical plant, and then through Johnson City and on to Erwin, TN, where there is a large yard and crew change point.
Modern day CSX uses the superbly engineered Clinchfield at near maximum capacity, running as many as 25 trains per day between division points Erwin, Tennessee, and Shelbiana, Kentucky. Modern day Norfolk Southern runs about 8 trains per day on the Clinch Valley line, which runs from Bluefield, Virginia, to Norton, Virginia.