^Southbound trailblazer at Barber Greene Road, where DeKalb meets Sycamore, June 2022.
Illinois Route 23 runs north-south in north-central Illinois, a little east of Illinois's exact center. Illinois Route 23 connects many different communities, serving as the main north-south route in DeKalb, eastern LaSalle, and western McHenry Counties. It cuts into Livingston County, too, to end at Pontiac.
The northern end of Illinois 23 is at US Route 14 in Harvard, about seven miles south of the Wisconsin border:
The northern end of Illinois 23 is at US Route 14 in Harvard, about seven miles south of the Wisconsin border:
Illinois 23 enters Marengo and meets the western end of Illinois 176:
Still in Marengo, Illinois 23 crosses US Route 20:
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About five miles beyond Marengo to the south, Illinois 23 meets a newly constructed fountain interchange providing access to Interstate 90...
East of Genoa, Illinois 23 joins Illinois 72 westerly:
Soon after hitting the Genoa village limits, Illinois 23 splits from Illinois 72 to resume going south:
In Sycamore, right next to the DeKalb County Courthouse, Illinois 23 joins Illinois 64 west:
After passing through downtown Sycamore together, Illinois 23 splits from Illinois 64...
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Illinois 23 crosses Illinois 38 in DeKalb, at a point where a set of railroad tracks cut diagonally across the intersection...
At Waterman, Illinois 23 crosses US Route 30:
Near Leland, Illinois 23 joins US Route 34 west...
After a few miles, Illinois 23 splits from US Route 34 to go south again...
West of Serena, Illinois 23 is joined by US Route 52 which comes from the east:
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After two miles and rounding a bend, Illinois 23 splits from US Route 52 to head south:
Entering Ottawa, Illinois 23 has an interchange with Interstate 80:
In Ottawa, Illinois 23 crosses US Route 6 as Illinois 71 comes from the east leg of the junction and turns southerly to join Illinois 23:
Just after crossing the Illinois River, Illinois 71 splits from Illinois 23 to head west into Starved Rock State Park:
At Streator, Illinois 23 crosses Illinois 18:
Four miles to the south, Illinois 23 crosses Illinois 17:
After turning easterly through Cornell, Illinois 23 straightens out to head south as it meets Illinois 170:
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Entering Pontiac, Illinois 23 meets an interchange with Interstate 55:
Illinois 23 reaches its southern end in Pontiac at Illinois 116:
