Abstract: A portable boundary system (PBS), which is a complete pre-measured boundary-line system used for sport specific boundary lines/markings. Whether tennis, pickleball, basketball, badminton or other sports requiring boundary lines/markings, the PBS's of the present disclosure allow a single user to accurately set-up and define a sport's court/playing area. Assembly and disassembly of PBS's and “pop-up” nets takes a fraction of the overall time and cost of traditional court assembly methods. Since PBS's and “pop-up” nets are portable, they can be packaged efficiently and moved to varying locations. PBS's do not mark or mar gym floors, concrete, asphalt, grass or other hard or soft surfaces. PBS's are made from PVC/Vinyl and are durable and re-usable.