Monument Beach Marina Boat Ramp is a paved ramp accessible at all tides located at 22 Emmons Road in Bourne, offering launch access to Phinneys Harbor and upper Buzzards Bay.

The facility includes 61 marina slips, 35 moorings, fuel service, public restrooms, and adjacent parking, though solo launching requires securing your boat to the beach as there is no launch float.

Note that Bourne strictly enforces "no power load" regulations, and parking permits are required for non-residents (fees apply for temporary or extended permits).