[3][4] In 2016, the 17-year-old finished in seventh place in the final of the women's 3000 m steeplechase event at the 2016 IAAF World U20 Championships held in Bydgoszcz, Poland.

[6][7] She also competed in the junior women's race at the 2017 IAAF World Cross Country Championships in Kampala, finishing in seventh place.

In 2019, she competed in the senior women's race at the 2019 IAAF World Cross Country Championships held in Aarhus, Denmark.

She beat pre-race favorites such as Beatrice Chepkoech and Hyvin Kiyeng Jepkemoi to finish with a time of 9:01.45, a national record, and win the gold medal.

[10] Peruth won the silver medal in the 3000m steeplechase at the 2024 Summer Olympics, finishing behind Winfred Yavi in a new Ugandan national record of 8:53.34.