Colstar (foaled 1996 in Kentucky) is an American Thoroughbred racehorse and broodmare. Sired by the 1991 Breeders' Cup Mile winner, Opening Verse, she was out of the mare Ascend, a daughter of Preakness and Belmont Stakes winner, Risen Star.Racing in Maryland, Colstar's first important win came in 1999 in the Grade III Martha Washington Stakes following by a win the next year in the Gallorette Handicap.