The caravans had previously been parked on the Curragh.
More than 100 caravans have arrived on State owned lands in Laois.
The High Court is granting an interim injunction preventing trespassing on over 400 acres in Maryborough in Portlaoise.
The caravans had previously been parked on the Curragh Plains in Kildare, according the Irish Independent.
Gardaí say around 50 vehicles and caravans arrived at the Great Heath of Maryborough opposite the Heath GAA club around June 22nd.
Days later there were between 80 to 100 caravans.
The county council is reporting that skips and portable toilets have since been delivered to the area.
Residents and those who have animals that graze on the land have also made complaints.
The OPW's biodiversity officer says the Heath lands are one of the few surviving semi-natural grasslands in Ireland and the situation is posing a significant threat the to the habitat.
A bailiff company who had also dealt with the trespassers in the Curragh, has served notices that they should leave.
Mr Justice Brian Cregan issued the injunctions and said the case could be back before the courts before the end of the week.
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