Highland Lass ($12) won her debut in a maiden race for 2-year-old fillies at 5 1-2 furlongs, leading throughout under jockey Tyler Conner.
Trained by John Sadler, Highland Lass is owned by breeder Michael Talla.
Highland Lass set fractions of 21.86 seconds for the opening quarter-mile and 45.39 for a half-mile, holding off a late threat from 2-1 Hottalabamba, a $425,000 2-year-old in-training purchase in May.
Highland Lass, by Quality Road, won by 1 3-4 lengths.