Its eastern terminus is at a signalized intersection with SR 254 in Avon.

The entirety of SR 611 exists within northern Lorain County.

From there, the highway was routed along its current alignment to its eastern terminus at SR 254 in Avon.

[3][4] In 1946, SR 611 took on the alignment that it follows today, as the result of a westward extension.

From the intersection of Colorado Avenue, Kansas Avenue and Henderson Drive in Lorain, the highway was re-routed south onto Henderson Drive, which is used to cross the Black River, then turned southwesterly into a connection with 21st Street, which it followed heading west across Lorain to its current western terminus at US 6 in the northwestern portion of the city.