Work will begin next week on replacing the boardwalk at a nature reserve in Llangefni.
The 1,000 metre-long timber footbridge at the Dingle will be replaced by a new structure made out of sustainably sourced recycled plastic.
Anglesey Council says the change has been made possible after securing UK and Welsh Government funding.
The work will take six months to complete with parts of the boardwalk being closed to the public, starting from Tuesday.
Council leader Gary Pritchard said: "The Dingle is a highly prized community resource valued by locals and visitors alike."
"I’m grateful to our countryside and AONB (Area of Outstanding Natural Beauty) team for securing this vital funding to provide a new boardwalk which will ensure that this haven for wildlife can be enjoyed by the public for decades to come.”
Tree safety management work and surveying will take place before work starts on removing the old boardwalk - which will see the section leading from the car par at St Cyngar's Church being closed.
During the early stages, the section running from Station Car Park to Llyn Pwmp and up to the B5109 (Clidwrn Road) will remain open.
Both the Lôn Las Cefni cycle route and the Coed Smyrna area remain open throughout - and the weekly Park Run held in the Dingle reserve on Saturdays will continue as planned.
The council says installing the new boardwalk "will take time" - with work due to be completed in April - and will inconvenience visitors who regularly take a walk around the reserve.
The project is being welcomed by the three Plaid Cymru county councillors representing the Canolbarth Môn ward.
Cllr Dylan Rees said: "The Dingle is a cherished part of our local community, and this new recycled plastic boardwalk will ensure it remains accessible and enjoyable for years to come."
Cllr Non Dafydd added: "Replacing the old wooden boardwalk with a recycled plastic structure at the Dingle will represent a significant improvement for everyone who enjoys visiting. It will provide a far more resilient foot path for visitors whilst also supporting our green initiatives."
Cllr Paul Ellis said: "I look forward to seeing these works providing improved accessibility at the Dingle, ensuring that it remains an important community resource and attraction for the people of Llangefni and Anglesey as well as visitors."
Funding for the project has been sourced by the UK Government's Shared Prosperity Fund, the Welsh Government and Anglesey Council.