Alton-Triggs first made Queensland state selection in the 2015 women's youth eight which contested and placed second for the Bicentennial Cup at the Interstate Regatta within the Australian Rowing Championships.

[1][8] The next year she was selected to race a coxless pair with Annika Hoffman at the 2016 World Junior Championships in Rotterdam.

[9] At the Rowing World Cup II in Varese Italy, Alton-Triggs raced in the Australian women's eight.

[1] For the 2023 World Rowing Championships in Belgrade Serbia, the Australian women's eight was unchanged overall although Alton-Triggs moved from bow into the four seat.

In the A final they led through the first 1000m on a low rating of 37/38 but were rowed through by the high-rating Romanians and a fast finishing USA eight.