[13] At the 2015 Pan American Games, competing for Team Canada, Gollish won a bronze medal in the Women's 1500m with a time of 4:10.11.

[4][15][16] She was also named MVP of the 2015 Ontario University Athletics (OUA) Championships after winning three individual gold medals in the 600m, 1500m, and 3000m events.

[18] In March 2016, Gollish won a silver medal in the senior 10K with a 37:53 run at the 2016 Pan American Cross Country Cup.

[19] In November 2016 she won the CNO Financial Indianapolis Monumental Half-Marathon with a time of 1:11:07, setting a new course record.

[15] Later that month Gollish won the senior women's 10K at the Canadian Cross Country Championships in Kingston, Ontario, at Fort Henry.

Unfortunately, at 31 kilometres she was forced to DNF after the honking of a blocked pace car behind her caused her to go into an anaerobic state, leading to her cramping severely, walking, and then falling down.

[31][32] In June 2022, Gollish broke the previous women’s Canadian 40+ 1,500m record by seven seconds in a time of 4:16.46 at the La Classique d’athlétisme de Montréal.

[25] In September 2022 she won the women’s vertical climb at the Canadian Mountain & Trail Running Championships in Vernon, British Columbia.