Three men and a woman will face court over their involvement in a protest at Maules Creek on Saturday.
Police were called to Leard State Forest Road just after 8am, where they located the men and the woman allegedly blocking the road.
Verbal commands by police failed, and assistance was then sought by officers from Police Rescue.
The three men – aged 23, 24 and 36 – and the 27-year-old woman were arrested at the scene and taken to Narrabri Police Station.
They were charged with wilfully prevent free passage of vehicle and pedestrian obstruct driver’s path.
All four were granted bail, to appear at Narrabri Local Court on Tuesday, May 27
Two other people – a 39-year-old man and a 23-year-old woman – were also arrested during the incident, but released pending further inquiries.
Investigations into the incident continue.