Abstract: A light weight hollow run-off trough which can be secured to a down spout while being substantially supported by the ground is disclosed. The trough includes a depression adjacent its rear end for accommodating the distal end of the down spout. The trough body is formed of a resiliently deformable molded plastic and the rear wall thereof includes a separable portion having the shape of an inverted T. In use, the distal end of the down spout is inserted into the depression and the inverted T shaped portion is bent by 180.degree., and the arms thereof are wrapped around a vertical portion of the down spout, and tied.