The Olympic Park Line (numbered T7, coloured grey, also called the Olympic Park Sprint) is a railway line and an associated Sydney Trains service in Sydney, New South Wales, Australia that connects the Sydney Olympic Park precinct to the rest of the metropolitan train network. It has one station, Olympic Park, which is located on a balloon loop. The original purpose of the line to Olympic Park was to convey passengers to and from venues at Sydney Olympic Park and the Sydney CBD during the 2000 Summer Olympics.