Challenge yourself to earn the stunning Great Barrier Reef medal The Great Barrier Reef Virtual Challenge takes you on a route through the most extensive reef system in the world, home to over 9,000 known species. This virtual challenge comes with two routes: 100 mi / 160km (recommended for running and walking) and 1317 mi / 2119 km (recommended for cycling). Seems challenging? Well…it should. But you can set your own deadline, one that suits your goals. Besides a lot of motivation, here's what