On the west side of Lincoln County, SH-66 produces a business loop to Wellston, SH-66B (below). Just beyond this junction, SH-66 serves as the northern terminus of SH-102. The highway continues east, meeting up again with SH-66B on the east side of Wellston. Near this junction, SH-66 has an interchange with the Turner Turnpike (still carrying I-44). The route continues to parallel the turnpike as it comes to an intersection with US-177. East of this junction, SH-66 passes through the town of Warwick, where it crosses the Deep Fork of the Canadian River.