The Potomac Handicap was an American Thoroughbred horse race run annually in the latter part of September at Havre de Grace Racetrack in Havre de Grace, Maryland. Open to three-year-old horses, it was raced on dirt at a distance of a mile-and-a-sixteenth.First run at Laurel Park Racecourse in Laurel, Maryland, it was restricted to two-year-olds and run at a distance of one mile. The 1918 running was won by Calumet Farm's two-year-old colt, Be Frank, ridden by Lavelle Ensor.