She has represented Canada internationally in events such as the 2005 IAAF World Half Marathon Championships and the 2006 Commonwealth Games.

On October 13, 1996, Kortchaguina finished 1st in the Lyon Marathon in France, with a time of 2:35:35 (2 hours, 35 minutes, & 35 seconds).

The winner of the 1996 Puteaux Marathon, Romanian runner Lidia Panciu, finished with a time of 2:33:22, only 1 minute & 17 seconds faster than Kortchaguina.

In the 2006 Commonwealth Games held in Melbourne, Kortchaguina represented Canada in the marathon and finished in 6th place with a time of 2:36:43.

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