Mystery Island has provided Grand Annual Steeplechase winning jockey Shane Jackson with his biggest win as a trainer.

Count Zero has taken out the Grand Annual Steeplechase to go with his Jericho Cup success at Warrnambool.

Shane Jackson will chase his biggest success as a trainer when he saddles Mystery Island in the Warrnambool Cup.

Declan Maher will send Half Mast out for his debut run in a hurdle at Warrnambool.

With Warrnambool’s Jericho Cup (4600m) now only five weeks away, a golden ticket into the A$300,000 race is up for grabs in Saturday’s $40,000 NZB Airfreight Road to Jericho (3000m) at Riccarton.