Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Alluvial (foaled 1969 in Kentucky) is an American thoroughbred mare racehorse. She is sired by U.S. Racing Hall of Fame inductee Buckpasser, who in turn was sired by the 1953 United States Horse of the Year, Tom Fool, out of the Hill Prince mare Bayou. Alluvial was a half-sister, thru Bayou, to the graded stakes race winning filly Batteur, who won the Santa Monica Handicap, Santa Margarita Handicap, Santa Maria Handicap, and Santa Barbara Handicap, as well as the New York Handicap.