The Southwest Trail bisects the state of Arkansas from northeast to southwest, passing through Little Rock and Pulaski County. The trail followed a route used by Native American tribes, and became a thoroughfare for white settlers moving into the region from St. Louis. The trail ended at Fulton, Arkansas, on the bank of the Red River.
The term "Southwest Trail" appears to be a twentieth-century invention. It was known variously as the Arkansas Road, Congress Road, Military Road, Natchitoches Trace, National Road, Red River Road, or U.S. Road in the nineteenth century. The route of the trail is followed approximately by the U.S. Route 67 highway today.