Damson Wood near Market Drayton is a popular area for walks and access to the River Tern.
A statement from Say No – Longford Turning, a group set up to oppose development on the woodland, said that anti-social behaviour by “30 or 40” youths was reported over the Easter weekend.
It described “something akin to a rave” and “complete abuse of the nature by the litter that was left”.
“It has been reported to the local police who have visited the area today, we are hoping they will continue to be a regular presence around the area now the nights are drawing out and the weather is getting better.
"If anyone sees or witnesses any anti social behaviour please do report it to the police.”
West Mercia Police have been asked for comment.