 US 33 is the primary east–west highway of Rockingham County, which lies in the Shenandoah Valley.The highway connects the independent city of Harrisonburg (which also serves as the seat of Rockingham County), the town of Elkton, and an entrance to Shenandoah National Park.East of the Blue Ridge Mountains, US 33 connects the Piedmont communities of Stanardsville, Gordonsville, and Louisa.