The state government will introduce legislation to Parliament to expand the Mole Creek Karst National Park.
Parks Minister Jacquie Petrusma on Thursday said it was the government's intention to add 2850 hectares of land set aside for future forestry activity to the national park.
The land includes the Kubla Khan Cave.
This aligns with part of a proposal from the Tasmanian National Parks Association for a Kooparoona Niara/Great Western Tiers National Park
Ms Petrusma said the government had also proposed another 22,550 hectares of Future Potential Production Forest land in the Tasmanian World Wilderness Heritage Area be either turned into a conservation area or a regional reserve.
"This proposal does not preclude the involvement of Tasmanian Aboriginal people in land management nor does it create additional barriers to land return in the future," she said.
Both proposals would need the approval of both houses of Parliament.
Labor's Shane Broad criticised the lock-up of more land that could be used for forestry purposes.
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