On Oct. 12-13, 1974, LGR was the site of the second-ever Sports Car Club of America Solo National Championships (then also called Solo II), an autocross event put on by the Chicago Region of the SCCA. 249 drivers competed in 15 classes over a serpentine course that utilized both the oval and the dragstrip. Fast time of the event was turned in by Gary Lownsdale who won A Modified in a Lotus Elan S2 with a best run of 52.736 seconds.