Wanganui people are expected to be among marchers protesting against an oil drilling programme near Egmont National Park.
The hikoi starts from Parihaka, north of Opunake, on Sunday and ends at the Hawera town centre next Wednesday.
It is being promoted by a South Taranaki hapu which is seeking supportto protest about a decision permitting Tag Oil to drill for oil 220 metres from the southern boundary of the park.
March organiser Missy Spooner said people from Ratana and Wanganui would be travelling to join others.
She said Tag Oil had been granted permission to drill from 1000-5000m on a site on Rowan Rd, which she said was "pretty much" at the base of Mt Taranaki.
"Our maunga [mountain] is one of the most photographed and painted treasures of Aotearoa. This invasion of our precious taonga affects not only Maori but also all New Zealanders."
The marchers will be staying at marae along the route, on State Highway 45 from Parihaka to Hawera.
A spokesman for Ngati Haua Whanui said they were also considering appealing the decision in the Environment Court and had 20 days to object.
Tag Oil was granted consent on November 13 to establish and test up to eight oil and gas exploration sites, as well as establish oil and gas production facilities at Rowan Rd.
But Nga Hapu o Ngaruahine Iwi executive chair Daisy Noble said Maori cultural concerns had been ignored in the decision.
Mrs Noble said the key element was the proximity of the drilling to the national park.
She said it did not matter if Tag Oil was drilling above or next to the mountain, resources were still drawn from the mountain.
Ms Spooner said they expected the hikoi would attract up to 100 people.
