News Halloween Celebration in Everett by Independent Staff • November 8, 2019 • 0 Comments Mayor Carlo DeMaria had Everett kids help him cut the ribbon to officially open RiverGreen Park. Dalissa Lopez posed in a pumpkin patch at RiverGreen Park on Saturday afternoon, Nov. 3, during the City’s Halloween celebration – which also included the ribbon cutting ceremony for the new RiverGreen Park funded by Encore Boston Harbor.