Picturesque Motuarohia Island in the Bay of Islands will be closed to the public for up to four months from May 1 for tree felling and a track upgrade.
The Department of Conservation wants the work done in time for the Tuia 250 celebrations later this year, because Motuarohia — also known as Roberton Island — was a key site in the first encounters between Māori and the explorer Captain Cook in Northland.
Although much of Motuarohia is privately owned, the middle section is a recreation reserve with a pair of lagoons ideal for snorkelling and a track up to a lookout and a historic pā.
The 19ha reserve is hugely popular with boaties in summer.
DoC Bay of Islands office acting operations manager Martin Akroyd said the reserve had to be closed while a contractor removed a number of old pine trees to make the pā site visible during the Tuia 250 celebrations.