Abstract: A deployable mobile trailer with multiple deployable walls is disclosed. The mobile trailer includes wheels rotatably coupled to a base and a frame attached to the base. The frame has vertical supports attached to the base and a top frame assembly disposed at a top end of the vertical supports. First and second elongate deployable walls are rotatably attached to respective first and second sides of the frame. The first and second walls include and are movable between respective retracted and deployed positions. A deployable end wall is rotatably attached to an end of the frame and has a retracted position and a deployed position between which it is movable. Multiple activity devices are removably attached to the top frame assembly, the first elongate deployable wall, the second elongate deployable wall, or the deployable end wall. A mobile activity structure and method for operating a mobile deployable activity structure are also provided.