Big Red is located 30.17kms West of Birdsville, 266.24kms NorthWest of Innamincka and 339.99kms South of Boulia, in the state of Queensland.
Big Red, also known by its aboriginal name as Nappamerri, is a huge sand dune in the Simpson Desert that stands approximately 90 metres above sea level and 35 metres above the plain, although height may vary due to winds and dunal movement. This sand dune which sits 33kms west of Birdsville in Queensland, provides an extremely challenging feat for 4WD enthusiasts although it is not necessary to scale its height to traverse the Simspon Desert as there are alternative routes.

When heading out into the Simpson Desert NP from Birdsville, Big Red is the first and highest of over 1,100 sand dunes that run north-south for hundreds of kilometres. This landscape is dominated by parallel, wind-blown sand dunes ranging from a few metres to 20 metres high. The striking colours and the huge expanse of arid landscapes are some of the reasons why many visitors are attracted to the area.