Sarnia Lambton has over 65 Ball Diamonds.

Sarnia Lambton's ball diamonds are classified relative to the level of service and amenities found in the Park.

Class "B" diamonds are maintained on a daily basis including the lining and floating of the infields. Bases are provided at the distance requested, as is the pitching rubber (if necessary) and all diamonds are suitable for youth or adult play. Some of the Parks also have washrooms, dugouts, press boxes and in some cases picnic shelters and/or change rooms.

Class "C" diamonds are maintained periodically including the floating and lining of the infield. These diamonds may have some minor use restrictions and the Parks may not have the amenities as listed above.

Class "D" diamonds have significant use restrictions for example a short outfield fence and are maintained on an occasional basis.