Nuclear Free NT and rally organiser Cat Beaton said the nuclear waste should remain where it is, and that it will not be just medical waste, as the Government has said.

"I don't have the answers, I don't pretend I do," she said. "The majority of waste is stored at Lucas Heights (South Sydney) where it is safe.

"Keeping it there minimises transport.

"It's false to claim that the waste dump is purely for medical waste."

Ms Beaton said after the march the protesters would campaign their cause with people along the route to Muckaty.

Ms Beaton said there were between 80 to 100 people at the march throughout the afternoon.

"We want a proper inquiry on waste management," she said.

One of the speakers was local member for the area, Barkly MLA Gerry McCarthy.

He said he was hopeful the waste site would be overridden, and if it did go ahead locals would resist.

"No matter what politicians say in Canberra, they will remain (at Muckaty)," he said.

The Northern Land Council nominated Muckaty Station to the Federal Government as a possible waste site four years ago.