The Great Western Sand Storm in Western Australia has 5km, 10km, 21km half marathon, 42km full marathon and 50km ultra marathon events.
Please note this event will not be going ahead in 2016, but should return in 2017.
Then there's the Sand Storm Circuit, featuring "THE PUNISHER" (running with exercises); and also the ability for participants to come down at any time during the day and run any distance of your choice from 1 km up to 10 km.
This not-for-profit event is for an excellent cause: Soldier On, a charity that supports our physically and psychologically wounded Australian Defence Force personnel and their families; and Red Cross WA.
or anything from 1K to 10K