Broken Hill is a city in the far west region of outback New South Wales, Australia. An inland mining city, it is near the border with South Austr…Broken Hill is a city in the far west region of outback New South Wales, Australia. An inland mining city, it is near the border with South Australia on the crossing of the Barrier Highway and the Silver City Highway, in the Barrier Range. It is 315 m above sea level, with a cold semi-arid climate, and an average rainfall of 265 mm. The closest major city is Mildura, 300 km to the south and the nearest State Capital City is Adelaide, the capital of South Australia, which is more than 500 km to the southwest and linked via route A32, the Barrier Highway.