Police are appealing for witnesses after a changing room block in Coppull was targeted by intruders.
Officials from Chorley Panthers RL club are counting the cost of the damage after the locks were vandalised and doors opened.
It is believed the attempted burglary was thwarted when the intruders were disturbed by a dog walker.
The incident took place at the club on Preston Road. Peter Bridge, chairman of Chorley Panthers, has condemned their actions.
He said: “It is just a nuisance having to repair all the locks and trying to stop people getting onto the site Luckily, nothing was taken from the changing rooms so it could have been far worse.
“We are looking to do regular patrols on the site and when we told the police about it they said they would keep an eye on the place.
“It is just very disappointing when you have so many volunteers giving up their time to help the young people play rugby.
“As a club we are doing really well with more than 18 teams in action including the Open Age senior side who are competing in the new summer league.
“Meanwhile our U12 and U13 sides have qualified for the semi-finals of the NWC Cup.
“I just think it is disgusting that the actions of others could have affected. We also have a lot of work going on at the minute on improving the drainage on our pitches as well as the new gymnasium and changing facilities.”
The incident took place at the club on Preston Road overnight on May 3.
A spokesman for Lancashire Constabulary said: “It was reported to us between midnight and 12.30am.
“It is believe the offenders used a flat bladed instrument to break open the doors. They fled the scene when they were disturbed by a dog walker.
“We want anyone who was in the area at the time or even earlier in the night and seen anything suspicious to get in contact with us.”
n If you have any information please call 101 or alternatively get in touch with Crimestoppers on 0845 555111.