As the fall season approaches, the St. Mary’s County Department of Recreation and Parks is preparing transform the Great Mills Swimming Pool into an indoor facility. To accomplish this task the pool will close for seasonal maintenance on Tuesday, September 2 and remain closed through Sunday, September 14. The pool will reopen for normal hours of operation on Monday, September 15.

During this time, workers will install the pool’s air supported “bubble” structure, making the pool an indoor facility. Other maintenance and staff training will also occur while the pool is closed.  

The Department of Recreation and Parks regrets any inconvenience the temporary closing of the pool may cause.  For more information, please visit the Great Mills Swimming Pool at 21100 Great Mills Road, in Great Mills or call (301) 866-6560.  For information on activities and programs at the Great Mills Swimming Pool, visit our website at