Illinois State Route 251 is in Mc Lean County for a short period of time. This is also the southern end of IL St Rt 251. IL St Rt 251 does not pass through any towns in Mc Lean County. IL St Rt 251 is not multi-plexed in Mc Lean County. IL St Rt 251 intersects the following highways in Mc Lean County. Interstate 39, north of Hudson. U.S. Rt. 51, north of Hudson.
BGS on NB I-39/U.S. Rt. 51. NB guide marker in Mc Lean County. The southern end near Kappa. The southern end marker.
