Illinois State Route 251 is a major surface artiery in Western-La Salle County. It provides access to the main shopping locations on the northside of Peru. This is also one of the few state highways in La Salle County to go from the northern boarder to the southern boarder. IL St Rt 251 passes through the following towns. Mendota
Peru
La Salle
Tonica
Lostant
IL St Rt 251 is multi-plexed in La Salle County. U.S. Rt. 52, from Mendota to near Troy Grove.
IL St Rt 251 intersects the following hihgways in La Salle County. U.S. Rt. 52, near Mendota
A La Salle County mile marker. A junction marker on WB U.S. Rt. 52/NB IL St Rt 251. WB U.S. Rt. 52/NB IL St Rt 251 in Mendota. WB U.S. Rt. 52/NB IL St Rt 251 in Mendota at the BNSF railroad. WB U.S. Rt. 52/NB IL St Rt 251 south of Mendota. Street sign in Rural Northern La Salle County. NOTE: The labeling that it is "US 251". NB guide marker. A junction marker on EB U.S. Rt. 52/SB IL St Rt 251. NB IL St Rt 251 north of Peru. NB IL St Rt 251 on the northside of Peru. NB IL St Rt 251 north of I-80. A BGS on EB I-80. A BGS on WB I-80. A BGS on EB I-80. Looking south along IL St Rt 251 from the I-80 overpass in Peru. Sign on SB IL St Rt 251 for thru traffic. At U.S. Rt. 6 the right lane splits as a ramp to WB U.S. Rt. 6. A junction marker on WB U.S. Rt. 6. NB IL St Rt 251 at U.S. Rt. 6 in Peru. NB IL St Rt 251 near the Illinois River Bridge at Peru. Looking east at the IL St Rt 251 bridge. NB IL St Rt 251 at the Illinois River Bridge. NB IL St Rt 251 crossing the Illinois River. Looking south along IL St Rt 251 at the Illinois River Bridge at Peru. NB IL St Rt 251 entering the Illinois River Valley. SB IL St Rt 251 near Illinois Valley Comn College. BGS on NB I-39/U.S. Rt. 51. NB IL St Rt 251 at IL St Rt 71/351 south of Oglesby. SB IL St Rt 251 in Tonica.
