[5] In July she was stepped up in class for the Listed Star Stakes at Sandown Park Racecourse in which she was ridden by Kieren Fallon and finished second, beaten a head by Queen of Poland.
Ridden by Steve Drowne, she tracked the leaders before taking the lead approaching the final furlong and winning by one and a quarter lengths from Slip Dance.
In September, Maids Causeway was moved up in class and distance for the Group Two May Hill Stakes over one mile at Doncaster Racecourse and finished third of the eight runners, beaten three quarters of a length and a short head by Playful Act and Queen of Poland.
Two weeks later she contested the Group One Fillies' Mile at Ascot Racecourse in which she started third favourite behind Playful Act and the Michael Stoute-trained Echelon.
Maids Causeway tracked the leader Fen Shui before taking the lead two furlongs from the finish and then getting the better of a sustained struggle with Penkenna Princess to win by a short head, with the Clive Brittain-trained Favourita in third.
Penkenna Princess, Fen Shui, Slip Dance, Echelon and Favourita were in the field, but her main opposition appeared to come from the Nell Gwyn Stakes winner Karen's Caper and the previously unbeaten Shanghai Lily.
Maids Causeway tracked the leaders before taking the lead two furlongs from the finish but was overtaken in the closing stages and beaten two and a half lengths into second place by Virginia Waters.
[11] After a break of more than three months, Maids Causeway returned at Newmarket in October in which she was matched against older fillies and mares in the Sun Chariot Stakes.