Senator Hanson arrived at Uluru on Wednesday and said she will make the climb as soon as weather allows.
"I have been given permission by Anangu Mayatja Council of Elders, Mr Reggie Uluru and Mr Cassidy Uluru to climb the Rock. Both are senior traditional owners of Uluru," she said on social media on Wednesday afternoon.
Even with the permission of these elders, she has been criticised by both Indigenous and non-Indigenous Australians.
"It's a stunt," Labor's Opposition Spokesperson for Indigenous Australians Linda Burney told SBS News.
Ms Burney, the first Indigenous woman in the House of Representatives, accused Senator Hanson of cultural insensitivity for her ongoing campaign.
"She has no appreciation whatsoever of the cultural significance of Uluru ... Uluru is a living being for Aboriginal people. It's not something that you clamber over," she said.
Ms Burney visited Uluru on Sunday where she "had a long conversation with some of the traditional owners [who] explained to me the very real and deep cultural reasons why they are resolute in closing the climb with the full endorsement of the management of the park".
She also dismissed the fact that Senator Hanson received "permission" to climb.
"The climb is an open climb at the moment. The traditional owners cannot stop anyone climbing [for the time being]," she said.
Ms Burney added that safety concerns are a big reason why traditional owners and management will close the climb.
Senator Hanson's vow to climb Uluru was also met with considerable criticism on social media.
But there have also been messages of support on Senator Hanson's Facebook page.
In 2017 the Uluru-Kata Tjuta National Park Board voted unanimously to close the climb, in a decision widely welcomed by Indigenous leaders who said it recognised the cultural significance of the site and would "right an historic wrong".
The last day to climb has been set for 26 October.
"This decision has been a very long time coming and our thoughts are with the elders who have longed for this day but are no longer with us to celebrate it," Central Land Council director David Ross said at the time.
But in recent comments, Senator Hanson likened banning the climb to closing Bondi Beach.
"The fact is, it's money-making. It's giving jobs to indigenous communities, and you've got thousands of tourists who go there every year and want to climb the rock," she said.
About 300,000 people visit the area each year but the number who opt to climb Uluru has been steadily falling.
A sign at the site has long requested people avoid climbing out of respect for the wishes of traditional owners.
Figures from Parks Australia indicated only 16 per cent of visitors to the park made the climb between 2011 and 2015, down from about 74 per cent in the 1990s.
Though there has been a spike in recent months, most likely because of the impending ban.