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 Spartanburg.

The southern terminus begins at exit 25, where the road continues as US 176/South Carolina Highway 9 (SC 9).

In that year, I-85 moved to the north, orphaning I-585 from a direct connection to its parent route, a situation that remained until upgrades to US 176 over the next decade provided a freeway connection between I-85 and I-85 Bus, except for a stoplight at Upper Valley Falls Rd/Fairforest Rd.

Sometime between 2000 and 2012, the route was removed, with no current state or federal maps listing it nor any physical signage.