Each year the Lake Tulloch Resort hosts a summertime party titled the BUMP. This year marks the fifth annual BUMP party. The party begins at 12 noon on the 23rd and runs to 2 am the 24th. Advertised as an all age event the event brings in people and boats from all over the valley and the foothills. It also brings in money that the resort reportedly needs to meet operating costs. Each year extra personnel are put on staff at the Sheriff Department and the Copperopolis Fire Department for this event.