Vehicle access is to be reduced to the area known as the 'north arm' of Lake Otamangakau near Turangi.
The Taupo Fishery management team have been notified by the Lake Rotoaira Forest Trust of its intention to put a gate across Access Road No. 4, on the western side of the lake.
Access onto the forest lands is being changed to manage health and safety concerns.
While access to boat ramps will not be affected, there will be impacts on people attempting to access Lake Rotoaira Forest Trust land to the north of Lake Otamangakau dam.
Restricted access is expected to take effect from early December and will particularly impact on anglers who previously enjoyed the convenience of remote camping beside the lake.