Parents have applied for an interim injunction to halt the closure of St Bees School this summer.
The governors of the 400-year-old school had previously said it would close this year, but that they hoped to re-open it in 2016.
But campaigners say by then its long history will be destroyed and confidence in the school lost forever.
A legal move to halt the closure of St Bees has been made as part of the ongoing battle to save the 400-year-old school.
Parents have applied for an interim injunction to prevent the school's closure this summer.
The school's governors had previously said they hope to re-open St Bees next year, but campaigners say by then its long history will be destroyed and confidence in the school lost forever.
The West Cumbrian school is due to close this summer. The governors say falling pupil numbers mean it is not financially sustainable.
Governors have announced that St Bees School will close this summer.