Mc Lean County Highway 45 is a short north-south highway in Southwestern Mc Lean County. It runs from U.S. Rt. 136 to the Mc Lean/De Witt County Line, east of Mc Lean. McLCH 45 does not pass through any towns in Mc Lean County. McLCH 45 intersects the following highway in Mc Lean County. U.S. Rt. 136, near Mc Lean.