Interstate 585 (I-585) is a 2.25-mile-long (3.62 km) auxiliary Interstate Highway of I-85 in the US state of South Carolina. It is an orphan auxiliary route to I-85 since 1995 when the Interstate was relocated further north bypassing Spartanburg. In a concurrency with US Highway 176 (US 176) throughout, it spurs south from I-85 Business (I-85 Bus) for a couple of miles before entering the downtown area.