Her international debut came in distance running and she placed in the top 100 at the 2005 IAAF World Cross Country Championships junior race.

[5] As a student of Maxim Tank Belarusian State Pedagogical University, she was selected to run at the 2013 Summer Universiade and placed 14th in the half marathon.

[5] Mazuronak's first international medal followed at the 2014 European Team Championships First League, where she was third in the 5000 m behind Ana Dulce Félix and Fionnuala Britton, setting a personal best of 15:35.44 minutes.

[8] Her upward trend continued at the 2016 London Marathon as, after a battle for third with Florence Kiplagat, she took fourth place with a near two-minute improvement of 2:23:54 hours.

[11] 2018 saw Mazuronak win the European Athletics Championships marathon despite a nose bleed and taking the incorrect route in the last few hundred meters.