From the county line, the river is bounded to its east by the George Washington National Forest and to its west by Baker Mountain (2024 feet/617 m). Throughout this stretch, the Cacapon River is also joined by sections of the old Winchester and Western Railroad grade. It continues its meandering course northeastward, flowing past the community of Intermont and Hebron Church. At Capon Lake, the river is joined by Capon Springs Run and is the site of the historic Capon Lake Whipple Truss Bridge. West Virginia Route 259 parallels the Cacapon River to its west along the eastern flank of Baker Mountain until the road turns east across the Kenneth Seldon Bridge at Yellow Spring. From Yellow Spring Gap, the river is fed by a run whose source is the Yellow Spring.