George Margarson remains confident Lucky Kristale's stamina will last out over the Rowley Mile when she bids for Classic glory in the Qipco 1000 Guineas next month.
The three-year-old won four of her five starts as a juvenile, including victories in the Duchess of Cambridge Stakes on the July Course and the Lowther Stakes at York.
She has yet to race over further than six furlongs, however, and only time will tell whether she will get home at Newmarket on 4 May.
Margarson said: "She's a bit behind in her coat, similar to last year, but we have had an ideal preparation with her and haven't had to stop.
"The mild weather has meant the grass was open earlier than usual and I've been mindful not to do too much with her too soon.
"She's not a flashy worker, but what she has been doing has been pleasing me and she's on course for the 1000 Guineas.
"She will go straight to the race as I don't want to run her in a trial as she puts a lot into her races and I didn't want her having a hard race as it's a long season.
"If she turns out to be a sprinter, I'll give her an easy campaign and train her for next year, but I'm confident she will stay. If you look at her races last year, she wasn't stopping over six furlongs."
Assuming Lucky Kristale does get the trip in the Guineas, she is likely to be prepared for the Coronation Stakes at Royal Ascot and the Falmouth back at Newmarket.
"The plan is the Guineas, the Coronation and the Falmouth," said the trainer.
"We've had some big offers for her but you have got to value what you want to put in the bank and whether you want to throw the ticket away.
"She's always got the paddock value at three-quarters of a million and if she wins the Guineas, she will be worth a lot more than that."