The rebirth of Tycoon Tara's racing career has surprised Peter Snowden.

The mare came to Peter and Paul Snowden's Randwick stable from Victoria for one last shot at racing after a disappointing autumn campaign.

Tycoon Tara won the Group Two Missile Stakes in her first run for the Snowdens before proving it was no fluke by winning the Group Three Missile Stakes on August 20.

She has the chance to continue her renaissance in the Group Two Theo Marks Stakes (1300m) at Rosehill on Saturday.

"The first run I thought the wet track helped her and she might have been flattered a bit but there was a lot of merit in the second win," Snowden said.

Bendigo trainer Simon Wilde won two Group Three races with Tycoon Tara but after her form dropped off her owners decided it was time for a change.

"The owners wanted to give her one more try before she went to stud," Snowden said.

"Judging on her two runs this time in so far I think stud's been put back just a little bit further."

Snowden is unable to pinpoint the key to her turnaround but believes Tycoon Tara is better suited to Sydney's clockwise racing.

"I just can't believe how well she's done in the stable and I think it's reflecting in the performance on tracks," Snowden said.

While she steps up in grade on Saturday, Snowden says he can't fault her lead-up to the race.

"She looks fantastic," he said.

"She should get a good run and I thought she maps quite well."

Tycoon Tara is on the third line of betting at $8 behind Counterattack at $4.20 and $2.60 favourite Southern Legend.

Counterattack's trainer Chris Waller said the Theo Marks was a good starting point as he heads towards the Group One Rupert Clarke Stakes (1400m) and Group One Toorak Handicap (1600m).

"He's never been a fully developed horse, but he's starting to get there now," Waller said.

"He's let us down in a couple of his grand finals but he's always impressed in the lead-up races."