A CANNABIS crop bigger than the Sydney Football Stadium has been uncovered in a national park on the NSW far north coast.

The crop worth more than $8 million was found by police after a number of vehicles were recently seen driving into the park with covered numberplates.

The crop site, near a secluded narrow walking track known as Hell Hole Trail, measured 150m in length and 50m wide with a stock-proof fence surrounding it in the Bundjalung National Park.

There were more than 8500 plants — since incinerated.

“Our rural crime investigator and officers from National Parks and Wildlife Services found the crop on November 11,’’ Detective Chief Inspector Cameron Lindsay, crime manager for the Richmond Local Area command, said.

“This was a sophisticated and expensive setup, no doubt financed by an organised crime group,’’ he said.

“This crop is one of the largest found in recent times and its destruction will hurt those behind it,’’ he said.

The massive haul followed other efforts by police in tracking down Sydney cannabis supplies.

Over the course of last week, officers raided a number of locations in the Richmond area including Cawongla, Wadeville, New Italy, Double Duke, Jackie Bulbin, Mumblegum, Bulldog and Ewingar.

More than 4000 plants, with an estimated potential street value in excess of $8 million, were seized by officers from he State Crime Command’s Drug Squad.