Up to 40 wind turbines could be installed near Carlisle if plans for three wind farms go ahead.
The proposed sites are in Kershope Forest and Longtown and could produce up to 120 megawatts of energy per year, enough to supply around 80,000 homes.
Plans put forward by Durham-based Banks Renewables could see 10 turbines installed in Mossgrove and Stonechest, and up to 20 in Black Knors.
The area has been identified as ripe for wind farms by Cumbria Council.
The company said it will carry out intensive research and seek public consultation before finalising plans.
Managing director Phil Dyke said: "Onshore wind power generation through schemes such as this will play a crucial part in meeting the UK's energy requirements for the foreseeable future.
"The area in which we're proposing to site these schemes has been identified as having the most appropriate landscape for such developments.
"We will develop our proposals in a way which properly addresses any local issues that are raised.
"We will consult with a range of organisations including the Ministry of Defence, local residents groups, ecological groups and the local wildlife trust."