Search for missing Adelaide woman Lucy Duldig enters third day

Emergency services crews are scouring the Waterfall Gully area in the Adelaide Hills for a woman who vanished three days ago.

Lucy Duldig, 19, was last spotted walking in the area about 5:45pm Thursday.

Police said a number of resources had been called in to search a wide area within Cleland Conservation Park.

Ms Duldig was wearing a white and blue striped dress at the time she went missing.

Search parties and police on horseback spent Friday searching for Ms Duldig, but found no trace of the missing woman.