Sort of along the lines of closed tracks is Cumberland, Maryland Airport; however, the story of auto competition there isn't over.
Cumberland Airport hosted SCCA racing for one weekend per year starting in 1953. Many famous drivers and cars appeared there. Racing ceased at the airport in 1970. The airport has remained open to aviation. SCCA racing in this area found a home only at Summit Point, West Virginia, as Marlboro closed about 1970 also. Cumberland and Summit Point both had races in 1970.
In 2000, competitive driving returned to Cumberland Airport in the form of autocross. National Road Motorsports has been running a series of six events per year. The taxiways and ramps allow a wide-open course layout that is reminiscent of the old road racing course, although on a different part of the airport. Not much in the way of British car participation, although Alex and Linda Redding are usually there in her Black Tulip MGB/GT. Lots of Pork Chops, Corvettes (Dr. Mike McCagh's Farm Use '58 is fun to watch) and Cobra kits come out to play.
Maybe some day wheel-to-wheel racing will return to Cumberland Airport. In the meantime, there's autocross.
So I guess this is a case of a closed track that has re-opened.
Check out the Photo Archives year by year from '53 to '70:
https://www.nationalroadrally.com/photo/
There is a photo from '63 that shows John Luke and his wife, Peggy, changing a tire on a TR3. Luke was the first driver my brother crewed for.