Members of the public entering Otago forests without permits are endangering themselves, given the ongoing extreme fire risk.
Council-owned City Forests and Wenita Forest Products, Otago's two largest foresters, have both stopped issuing permits for recreational activity in their forests.
Wenita chief executive David Cormack said: "People entering the forests unpermitted are putting themselves in danger ... we don't know they're in there if something happens."
Regardless of the fire ban, unpermitted access to forestry blocks was on "ongoing issue" at most times of the year.
Wenita has about 30,000ha of forests between Balclutha and Dunedin, including Mt Allan, while City Forests has about 17,000ha.