The Balmoral Burn is back for its 20th year to raise money for the Humpty Dumpty Foundation.

Participants will charge up one of the steepest hills in Sydney, Awaba Street in Balmoral, on Sunday.

Wallabies Legend, and Balmoral Burn founder, Phil Kearns told Ben Fordham they’ve raised more than $30 million.

“It started out as a bit of a silly idea and we thought it would only ever be one.”

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