Blue Larkspur (1926–1947) was a bay Kentucky-bred thoroughbred race horse. He was inducted into the National Museum of Racing and Hall of Fame in 1957, and ranks Number 100 in The Blood-Horse's top 100 U.S. thoroughbred champions of the 20th Century. Of the 127 stakes winners bred by Colonel Edward Riley Bradley at his Idle Hour Stock Farm in Lexington, Kentucky – which includes Bimelech out of La Troienne – Blue Larkspur was considered the Colonel's finest horse.