Friday’s $300,000, Grade 2 Mrs. Revere Stakes at Churchill Downs is a flat-out fantastic betting race featuring 11 3-year-old fillies competing at 1 1/16 miles over a much-maligned turf course. After spending around $10 million to install a new turf course for the spring 2022 meet, Churchill officials halted turf racing in June after growing complaints about the course’s poor quality and safety issues.