蜜芽传媒

The 4 Deserts Grand Slam does what it says on the tin...

Across the Sahara -- that's Egypt, Jordan and Namibia; The Gobi March -- China and Mongolia; The Atacama Crossing -- Chile and The Last Desert -- Antarctica

Each Race is 250 kilometres long and has to be completed within seven days. 23-year-old Australian Jacqui Bell is competing and, now three quarters of the way through, she's been telling Sportshour how brutal it has been so far.

Photo: Jacqui Bell (Instagram @jacquiabell)