Illinois Route 1 (IL 1) is a state highway in the U.S. state of Illinois. Running parallel to the Indiana border, the highway starts at the free ferry crossing to Kentucky at Cave-in-Rock on the Ohio River and runs north to the south side of Chicago as Halsted Street at an intersection with Interstate 57. This is a distance of . Route description Cave-in-Rock to Birds IL 1 begins at the ferry dock for the Cave-in-Rock Ferry in the eponymous village of Cave-in-Rock along the Ohio River. A continuation of Kentucky Route 91 (KY 91), IL 1 begins its journey in the Shawnee National Forest, leaving the village of Cave-in-Rock for the hamlet of Loves Crossing, where it meets the eastern terminus of IL 146. For the next , IL 1 winds north through the forest, reaching a junction with IL 13, which connects to Equality and Shawneetown. Further north, IL 1 remains a two-lane road when it junctions with IL 141 at the Gallatin–White county line. IL 1 soon reaches the village of Norris City, where it junctions with U.S. Route 45 (US 45). Here, IL 1 turns northeast and bypasses the village. Continuing northeast for , the route reaches the village of Carmi. In Carmi, IL 1 is known as West Main Street, paralleling nearby IL 14. At the junction of Oak Street and West Main Street, IL 1 and IL 14 run concurrently. IL 1 and IL 14 follow East Main Street out of downtown Carmi, changing names to Cross Street as it enters the village of Crossville. In Crossville, IL 1 and IL 14 split, with the latter turning east on East Main Street. IL 1 turns north on North State Street through Crossville before leaving the village. Returning to its northeast progression, the route passes the community of Calvin before reaching a junction with Interstate 64 (I-64, exit 130). The interchange marks the entrance to the village of Grayville. In Grayville, the route crosses the Edwards County line and reaches a junction with the southern end of IL 130 (Hagedom Road). After the village of Grayville, IL 1 turns northeast and runs along a general parallel with the Wabash River. The route passes through the village of Keensburg before reaching the village of Mount Carmel. Now in Wabash County, IL 1 runs northeast through the village as West Third Street. At the junction with Walnut