is a 1.5 miles (2.4 km) tri-oval speedway in Joliet, Illinois
, southwest of Chicago
. The speedway opened in 2001 and currently hosts NASCAR
racing including the opening event in the NASCAR Cup Series playoffs
. Until 2011, the speedway also hosted the IndyCar Series
, recording numerous close finishes including the closest finish in IndyCar history. The speedway and Route 66 Raceway
, located adjacent to the speedway, are owned and operated by International Speedway Corporation
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