Summary: An Aboriginal axe grinding groove site in the bed of Bumbles Creek, where its forded by Kilkenny Road. It's estimated there are more than 500 grooves.

In the bed of Bumbles Creek is the largest collection of axe grinding grooves on the Central Coast – and possibly the Sydney-Hawkesbury region. It’s estimated that there are over 500 grinding grooves at the Kilkenny Road Grinding Groove site: Ian Sim noted 200 in the 1960s, a NPWS study in 1996 suggested 150+ grooves and Bob Pankhurst counted 322, with many more likely to be buried under silt.

The many grinding grooves are both under water and on both sides of the creek.

A number of engravings have also been recorded here, which include a circle, multiple mundoes and a human figure.

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Aboriginal Sites by National Park

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