From thence it roughly follows the Des Plaines River north, passing through such communities as Wheeling, Lincolnshire, Vernon Hills, and Libertyville, before merging with the Skokie Highway near Wadsworth.
From thence it roughly follows the Des Plaines River north, passing through such communities as Wheeling, Lincolnshire, Vernon Hills, and Libertyville, where it forms the historic core of Libertyville's downtown area. It continues on past Gurnee before merging with the Skokie Highway near Wadsworth.