 SH-11 then turns south on a five-mile (8 km) concurrency with SH-99, then turns back to the east, passing through more rugged terrain, through Pershing and Tallant (both unincorporated), before entering the oil town of Barnsdall later.Just east of Barnsdall, SH-11 serves as the southern terminus of SH-123, which connects to Woolaroc Museum.SH-11 then heads roughly southeast, through Wolco (unincorporated), and skirts Avant, turning due south upon entering Tulsa County, before intersecting SH-20 on the east end of Skiatook.