A petition has been launched by CAMRA members to save the Tetley's brewery in Leeds from closure.
Yorkshire branches of the consumer group launched the petition at the Great British Beer Festival today.
CAMRA attacked the decision by brewery owner Carlsberg to close the factory because it comes at a time when interest in real ale is growing.
Mick Moss, CAMRA Yorkshire regional director, said: "Taking the fight to the Great British Beer Festival has been a great ploy for raising the awareness of this potential closure outside of Yorkshire, with festival-goers of all ages expressing grave concern at a brewery closure that would drastically effect the community of Leeds.
"To brew Tetley's anywhere other than Yorkshire will simply mean it's not Tetley's! This petition we believe firmly will generate a groundswell of support during and after the Great British Beer Festival and we aim to present this petition to Carlsberg UK in a bid to convey the dissatisfaction of British drinkers at this potential closure.
"If Carlsberg UK are unable to keep brewing Tetley's in Leeds, we urge them to offer other companies the chance to take over the Hunslet site, and keep the brands, the recipes and the traditions alive within Yorkshire!"
The petition follows CAMRA's national AGM in York where a motion was passed to start a national campaign to save Tetley's.