Recent storms have reopened an old scar on the slopes of Mt Parihaka.
A large slip appeared on the mountain's western side on about July 9 after heavy rainfall, and is clearly visible from the Nixon St area of Kensington.
A Whangarei District Council spokesperson said the slip had not affected any of the mountain's popular walking tracks.
However, council staff were keeping an eye on the slip, which has re-opened a large scar on a "wound" that existed more than 100 years ago.