there is no narrc or divisional race at Thompson.

as far as I know this is the NARRC schedule.
May 10/11 - Pocono - PRB (Pocono Racing Board)
June 20/21 - Lime Rock - NER
July 19/20 - Watkins Glen - Glen
Aug 16/17 - NJMP-T - JRB (Jersey Racing Board)
Sep 6/7 - NHMS - NER
Sep 26/27 - Lime Rock - NYR (part of the Divisional Series)