Abstract: A trimaran standup paddleboard includes a main hull having a bow, a mid-beam and a stern. The main hull has a length and shape that extends from a point at the bow, broadens out to the mid-beam, and narrows to a point at the stern. The trimaran standup paddleboard further includes a platform on top and aft the main hull, the platform being planar and extending out sideways beyond the mid-beam of the main hull, and a pair of lateral struts extending laterally out from opposing sides of the main hull behind the platform from a proximal end of each lateral strut. The trimaran standup paddleboard further includes a pair of outrigger hulls, each outrigger hull being connected to a distal end of one of the pair of lateral struts, and positioned parallel with and spaced apart from the main hull aft the platform.