Fair Grounds in New Orleans will close out its sixth season of Quarter Horse racing Thursday with the $286,560 Louisiana Quarter Horse Breeders’ Association Sale Futurity. The 350-yard dash is the richest race of a meet that was extended two dates after a threatening weather pattern led the track to cancel its opening weekend. Trials for the Sale Futurity were to have been run during the season’s first week, but were rescheduled for Aug. 23.