Kentucky Route 686 (KY 686) is a 6.333-mile (10.192 km) state highway around the city of Mount Sterling, Kentucky. The route begins at Kentucky Route 11 and U.S. Route 460 north of the city and goes counter-clockwise, ending at U.S. Route 60 east of downtown. The western portion of the bypass from KY 11 south of the city to US 460 north of the city was completed in late 1985 as a four-lane highway. East of the southern junction with US 460 to the eastern terminus at US 60, KY 686 is a 2.827-mile (4.550 km) two-lane highway on a four-lane right-of-way and was completed in the early 2000s.