As I was being brought to work from the dealer repair shop, the driver told me he used to race at the old Twin Cities Speedway, which was located in Blaine. He mentioned it was off County Road J near I35W. It was a dirt track oval and there also was a nearby drag strip.
A look at the online map for that area is not too revealing
A look at the 1967 USGS map for the New Brighton, Minnesota Quadrangle shows that there is a small square of Blaine that has intruded into Mounds View.
The 1997 USGS map shows the current street configuration in that area, as well as some of the buildings.
The Aerial views show the current buildings. It is possible to match the buildings with the map layout, but there is not much to see.
Trees and fields have filled in the area. In this picture, the Medtronic CRDM Mounds View campus can be seen. It was built upon the old Mounds View City Nine Hole Golf Course that was called “The Bridges”.
A further look on the USGS New Brighton Quadrangle shows a landing strip just east on the other side of I35W. Presumably it was made obsolete by the nearby Blaine / Anoka County Airport.