On the Eastern slopes , the shorter , faster-flowing Jacky Jacky Creek , Olive , Pascoe , Lockhart , Stewart , Jeannie and Endeavour Rivers flow towards the Coral Sea . These provide important freshwater and nutrients to the healthiest section of the Great Barrier Reef . On the Eastern slopes , the shorter , faster-flowing Jacky Jacky Creek , Olive , Pascoe , Lockhart , Stewart , Jeannie and Endeavour Rivers flow towards the Coral Sea , providing important freshwater and nutrients to the healthiest section of the Great Barrier Reef .