The Great Barrier Reef is about 2,300 kilometers long, which is roughly 1,400 miles from end to end.

Quick Scoop

  • The reef stretches for over 2,300 km along the northeast coast of Australia, from the tip of Cape York down to just north of Bundaberg in Queensland.
  • In miles, that length is about 1,400, making it the largest coral reef system on the planet by far.
  • Its width varies a lot, but the headline fact is that this single reef system is longer than many countries from end to end.

Think of it as a living marine “highway” running almost the entire length of Australia’s northeast coast.

TL;DR: The Great Barrier Reef is about 2,300 km (1,400 miles) long.

Information gathered from public forums or data available on the internet and portrayed here.