LANCASHIRE County Council refused planning permission to fracking firm Cuadrilla for drilling at Preston New Road, outside Blackpool, in 2015.
The firm appealed to Environment Secretary Sajid Javid who overruled the council. Cuadrilla is currently preparing to drill.
The site is being targeted for daily protests by local residents and campaigners, including Preston New Road Action Group and Frack Free Lancashire.
On Wednesday and Thursday the action group will challenge Mr Javid’s decision in the High Court.
A spokesperson for the group said: “We trust that the Secretary of State’s decision to allow fracking at Preston New Road will be found unsound, and Lancashire County Council’s original decision will be reinstated.”
Fracking involves drilling into layers of shale deep underground and pumping in a toxic mixture of chemicals, sand and water at high pressure to fracture the shale to release gas.
Opponents say the process can cause minor earthquakes, pollute water tables and the atmosphere, and is a health hazard, especially to people with respiratory ailments.