Rock Flat Creek is a watercourse that is part of the Murrumbidgee catchment within the Murray–Darling basin. It is located in the Monaro region of New South Wales, Australia. Rock Flat Creek rises below One Tree Hill, on the lower slopes of the Snowy Mountains, part of the Great Dividing Range. The creek flows generally north by west before reac…Rock Flat Creek is a watercourse that is part of the Murrumbidgee catchment within the Murray–Darling basin. It is located in the Monaro region of New South Wales, Australia. Rock Flat Creek rises below One Tree Hill, on the lower slopes of the Snowy Mountains, part of the Great Dividing Range. The creek flows generally north by west before reaching its confluence its tributary, Cooma Creek, and then flows into Numeralla River, north of the town of Cooma. The creek descends 336 metres over its 41-kilometre course.