Having needed her first two runs as a juvenile, she got off the mark at The Curragh at the third time of asking in a Fillies' Maiden.
However, since then she has raced four times between seven furlongs and a mile in decent graded events and has struggled being outclassed.
Stepping up in trip on debut this term brought bring improvement out of her, when winning the Group Three Musidora Stakes at York over 10.5f.
Many thought off the back of that she should have been closer in the market to her stablemate Santa Barbara, and they were right.
Snowfall went on to take the event with ease, winning by a record 16 lengths for Aidan O'Brien and jockey Frankie Dettori and that saw the handler land the event for the ninth time.
Off the back of that she made it three wins from three for the season when landing the Oaks double at the Curragh, again going on to score by a wide margin.
She made it an Oaks treble next time out when comfortably taking the Yorkshire Oaks at the Ebor meeting and was then sent to France for a trial ahead of the Arc.
Odds on to make it five wins in a row and stay unbeaten for the season, she was shockingly beaten by Teona in the Group One Prix Vermeille.
Her season had been primed for a run in the Arc, but like her previous run she was flat and could only finish a tame sixth.
However, even running to that standard in this event should see her land the event.
The one to beat.