The ACT government will reopen a significant portion of the park on Friday - two years ahead of schedule.

Parts of the park that will reopen include Mount Tennent, Honeysuckle Ridge, Booroomba Rocks and the Orroral Valley.

The Namadgi National Park was closed following the devastating Orroral Valley bushfire, which burned through 80 per cent of the park in early 2020.

About two-thirds of the park have been open since July 2020, it was only the worst-hit core that remained closed.

The park was not set to fully reopen until September 2023, which caused uproar among bushwalkers who accused the ACT government of being overcautious.

However, ACT Land Management Minister Mick Gentleman said the park was able to reopen earlier due to favourable weather conditions and the work undertaken by the recovery team.

"Our teams have worked hard to make the park safer for the community to get back into the park well ahead of schedule, with a focus on critical issues with infrastructure and along public roads into the park," he said.

The Orroral Campground and the Yankee Hat Rock Art Site will remain closed.

"The Yankee Hat Rock Art Site remains closed as we work on upgrades to the site with the Ngunnawal people to integrate their values, lore and knowledge into this work," Mr Gentleman said.

"This will take some time but it is important that we have new infrastructure, signage and experiences that respects and values the Ngunnawal culture and celebrates the cultural significance of this site."

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While most of the park will be reopened some public roads are still shut due to heavy rains last month, which caused the Naas Bridge to be washed away.

Mr Gentleman cautioned people to take care in the park as hazards would still be present.

"For many Canberrans, they will be heading into Namadgi for the first time since the Orroral Valley bushfire in January 2020," he said.

"The bush is still recovering, and the safety hazards brought about by the fires haven't completely gone away.

"Many tree branches are still very fragile so we ask that you avoid walking in fire affected areas on windy days. Always keep to the tracks because after a wet spring and summer there's a lot of thick regrowth if you head off the marked path."

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