MAR, Mid American Raceway in Wentzville Missouri. This track was just West of St. Louis and a very nice track in its day.
I spend many a weekend at MAR and raced open wheel and production there for almost 10 years back in the 1970's. This is where Dorsey Schroeder of Speed fame got his start.
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Mid America Raceways
Mid America Raceways was a 1200' dragstrip located near Wentzville, Missouri. The facility also featured a 2.89 mile course which passed out of service quite some time before the dragstrip shut down.
The road course was highly regarded, with varying elevation changes, a very long straight, and ten corners, 7 right and 3 left turns. There were 11 flag stations, #11 being on the straight after the driveover bridge near the end of the dragstrip. The dragstrip also had its run-off area downhill, so there was a strong need for good brakes.
This facility was torn down at the end of 2005, apparently sold for development.