It's Me went from a $9 chance to the $3.50 favourite with TAB Fixed Odds for the October 17 $1.3 million Kosciuszko (1200m) within moments of smashing her rivals in a 1000m class 3 Highway Handicap.

The four-year-old Shamus Award mare, a $1.85 favourite, was third last and four wide on the turn, spotting the leaders several lengths before unleashing a blistering run down the centre of the track to win by three lengths with Jason Collett aboard.

It's Me clocked 56.54 seconds for the Randwick 1000m, where two-time Everest champion Redzel holds the record at 55.73. She put together 200m times of 10.51, 10.79. 10.49 and 11.13 seconds on her way to a third consecutive win to start her career.

Cavanough was impressed with how his rising star, which debuted at Scone in August after a year off with a tendon injury, was able to back up the lightning splits.

"I know what times she can run at home but obviously I haven't been back to the well looking for them," Cavanough said on Sunday. "She's run 10.28s and 10.38s at home here, and peeled off sub 21s [for 400m], and they don't that too often.

"But it looks like she's getting better at it. I think she did it for almost half a mile yesterday. The improvement she keeps making, it's quite remarkable."

The win was a month since her first Highway Handicap success and Cavanough said she would not race again until the Kosciuszko, where he also has Fender as one of 13 confirmed starters. One spot in the 14-horse race for country-only horses remains.

Fender was seventh, 2.7 lengths away, in the group 2 Theo Marks Stakes (1300m) on September 12 in his final lead-up run.

"It was a 1300m race and the Kosciuszko is 1200m, and where he was at the 100, I was pretty happy," Cavanough said.

"He was beaten 2.7 lengths by multiple group performers, so I thought the run was pretty good."

Collett said of It's Me on Saturday: "I love her temperament. I was watching her walk around the yard before the start in the birdcage and she was the most relaxed runner, I thought."

"She feels so easy doing it against these types of horses but she does give you the feel of a classy filly.

"She has only had three starts and the Kosciuszko is the level she should be heading for."