HomeUSAMassachusettsNorth ShoreCape AnnDyke's Pond (Gloucester)North SideMud Flat BoulderMud Flat BoulderLAT,LNG 42.61350, -70.72020CREATED UPDATED Edit MapShareDescription[Edit]Mud Flat Boulder is a big block up on the tiny island.1 ClimbsComing soon: New Climbs1Revolving DoorV4+Bouldering