Morgan Herbst, a junior at Carlsbad High in California, won the girls invitational 300-meter hurdles in 42.52 seconds at the 64th Mt. SAC Relays Presented by Nike at Hilmer Lodge Stadium in Walnut, Calif. Herbst also anchored Carlsbad to a third-place finish in the invitational 4x400-meter relay in 3:51.20.