Ten Tauranga tracks will be temporarily closed while they are upgraded to prevent the speading of kauri dieback disease.
The Department of Conservation is upgrading the tracks from this month until March 2019.
The work includes installing new gravelled tracks, fencing, boardwalks, stairways and a viewing platform.
Tracks will be temporarily closed while they are being upgraded to ensure the safety of the public and the contractors.
Tauranga operations manager Jeff Milham said the upgrades will protect the forest's most susceptible kauri from the spread of the disease.