Treve is back in training ahead of a light program aimed at a third victory in the Prix de l'Arc de Triomphe.
Trainer Criquette Head-Maarek said the mare was stronger than ever following her winter break at the Haras du Quesnay stud in Normandy.
She has returned to Head-Maarek's stables in Chantilly after her owner Sheikh Joaan Al Thani decided to continue her racing career in 2015 instead of retiring her to stud.
Treve will begin her campaign in the Grand Prix de Saint-Cloud in late June followed by the Prix Vermeille at Longchamp in September, with the Arc on October 4 the ultimate objective.
"She's been back since last week. We've had the cold weather, so she's doing two hack canters day. She's fine and doing very well," Head-Maarek said.
"She's had a good break. She's very good and is stronger than last year.
"She will go for the Grand Prix de Saint-Cloud in late June. That will be her first race, then the Vermeille and the Arc.
"It's fun she's staying in training."