Abstract: A modular platform provides an octagonal inclined practice surface provided with a mat of artificial turf. The platform can be composed of multiple components each formed as a lightweight hollow blow-molded plastic molding. The slope of the practice surface can be increased to simulate virtually any lie encountered by a golfer during a round of golf by adding shim-like sections to the bottom of the platform. The lie of a golf ball experienced by a golfer can be changed by manually rotating the platform with respect to the surface upon which the platform is positioned.