The Coomealla isn't actually held in South Australia, held in Dareton, just out of Mildura. Swim held in the Murray River, depending on the flow rate of the water swim times vary from fast to ludicrously fast. Bike is an out and back course with one hill to get out of the river bank, other than that generally rough roads and wind the hardest part. Swim is generally a long straight swim from 1400m up the beach to the transition area.
Cycle is over a three loop, rough surface, generally windy circuit.
Run is a two loop affair where you run out along the road and back along the beach. Event moved from March to November in 1998 so that Ironman qualifiers could compete at Forster in the same year that they qualified for it in. Has also been the State Long Course Championships for many years. Swim held in the lakes around the housing area of Encounter Lakes, very flat and fast. Cycle leg is two loops of fairly undulating riding after going up one large hill out of town.