LAKE Boga are through to their first A Grade grand final in 21 years after a heart-stopping one-goal win over Swan Hill.

Trailing all afternoon, the Magpies came from behind to book their spot in the decider in a match up for grabs until the dying moments.

With minutes remaining, Lake Boga forced several crucial turnovers, which the Hepburn sisters Sarah and Katie managed to convert.

Scores wer...