Multiple G3 winner Gamble's Ghost is the 5-2 favorite with six minutes to post for the G3 Ontario Matron. She remained inside in the paddock, rather than go into the walking ring, on this hot afternoon, a wise move by trainer Josie Carroll.

Sister Nation is an appealing 10-1, while My Arch Enemy is a 7-2 underlay. Grizzel is in with a shot at 5-1.