CATTLE will be back grazing in the Millewa National Park even though they will be still excluded across the river in Victoria's Barmah Forest.

Large areas of red gum parks in NSW have been re-opened for grazing.

Minister for the Environment Robyn Parker today announced a scientific trial of grazing in national parks and reserves.

Member for Murray Darling John Williams said he was ecstatic at the decision.

He said former state forests and parks along a wide stretch of the Murray River from the Berrigan Shire to Wentworth would be re-opened to grazing.

He said farmers who formerly had grazing permits for the new park areas would be able to return their sheep or cattle.

''It is a great result for the people in this area,'' Mr Williams said.

Ms Parker said the trial, based on a recommendation to the previous government by the Natural Resources Commission and supported by the local community, would be overseen by an independent facilitator, former National Party MLC Richard Bull.

"This is a trial of the active management of forests recommended before the creation of the river red gum and cypress forest reserves by the previous government in 2010 and 2011,'' Ms Parker said.

"The trial will only be conducted on land where grazing permits were issued when the areas were State Forests. To enable graziers to adapt to the change to national parks, these permits have been extended to 2016 but no new land will be opened up to grazing for the trial.''

"I want to protect the environment while also making sure we continue to work on improving and diversifying regional economics and increasing regional employment and community development opportunities," she said.

A government spokesman said there are 92 permits for the area and Mr Bull would decide the most suitable location for the trial.

He said unlike the controversial Victorian trial, the NSW trial was in the state's south west not in an Alpine area.

The announcement comes as the Victorian and Federal governments wait for a court's decision into the future of grazing within Victoria's national parks.

Mountain Cattlemen's Association of Victoria president Charlie Lovick said the NSW's announcement was good news and a win for "sensibly-minded people".

"People are starting to realise that the management of our National Parks is just not working in its current form," Mr Lovick said.

"We have to look back through history and see how these areas were managed better through a combination of fuel reduction burning and grazing.

"We need to take a much different approach to how public land is being managed now have a much more pro-active attitude.

"The amount of fuel being built up in our country areas at the moment is very high and it is time for a more open-minded look at how we can manage these areas better."

Mr Lovick said the current Victoria Government had "led the way" in trying to get cattle back into the high country through a grazing trial before Environment Minister Tony Burke "got on a political junket and put a stop to that".

"The bush is more and more under threat from these bureaucratic decisions made by people like Tony Burke who have no real knowledge of what they are talking about," he said.

"I think Tony Burke now needs to take a really hard look at the situation from a genuine point of view, not just politics, and take in all sides, not be taken over by a one-size fits all approach that is pedalled by the green movement."