HomeUSAMassachusettsEastern, MAMiddlesex FellsBlack and White RocksFat ManFat ManLAT,LNG 42.44459, -71.07584CREATED UPDATED Edit MapShareDescription[Edit]Fat man is a large boulder near Crag 6. It has a handful of routes on it. This boulder has some poison ivy issues and bad landing zones. According to Boston Rocks this boulder is named after the WWII nuclear bomb.4 ClimbsComing soon: New Climbs1Early Exit5.10Tr2Off Ramp5.9Tr3Diet Ramp5.10Tr4Fat Man Easy5.5Tr