Portable adjustable athletic field boundary

Abstract: A self-contained portable adjustable boundary marking system capable of use in a variety of athletic settings where a boundary, line, or demarcation is desirable is disclosed. The system is adapted for use indoors or outdoors, on hard surfaces or soft. The system is modifiable and adaptable, and capable of rapid setup and takedown, and the system is thus suited for use in a variety of athletic play and training situations. The system includes boundary markers which contain at least one extensible element such as a tape, string, cord, or cable that may be extended to any desirable length up to the maximum length of the extensible element and attached to other markers of the system or to the playing surface itself to delineate the boundaries of a playing surface or to mark some other meaningful line on the playing surface. (end of abstract)