Ridder, Kazakhstan

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Ridder (Russian: Риддер, romanized: Rıdder), formerly known as Leninogorsk (Russian: Лениногорск) is a city in the East Kazakhstan Region in north-eastern Kazakhstan. Its population is approximately 50,500 (2009 Census results). The city is situated in the south-western Altai Mountains and north-east of the region's capital, Oskemen, along the Ulba River, at an elevation higher than 700 metres.