Two spring Group One winners will book-end an important set of Sydney barrier trials on Thursday.

Gai Waterhouse's Metropolitan winner Glencadam Gold will figure in the opening of 14 heats at Randwick with the Victoria Derby winner Fiveandahalfstar to close out the session.

Glencadam Gold is nominated to take on six rivals - just nine weeks after making the running for a long way in Green Moon's Melbourne Cup.

The import won his first four races for Waterhouse, graduating from a Canterbury midweek win to post a 3-3/4 length victory in the Group One Metropolitan at Randwick.

He started favourite to win the Caulfield Cup but ran 15th before rebounding with his sixth placing in the Melbourne Cup.

Fiveandahalfstar also enjoyed a meteoric spring rise, winning a Canterbury maiden - two starts and 17 days before his Victoria Derby win as a $41 outsider.

Rosehill Guineas winner Laser Hawk is entered for his second trial since returning to work while More Joyous' two-year-old sister Most Joyful will step out in heat 11.

Colorado Claire, Julienas, Ashokan and Raceway are other prominent autumn hopefuls included among 104 entries.