The Kleiner Rettenstein is a 2,216-metre-high (7,270 ft) mountain in the Austrian state of Tyrol. It lies in the Kitzbühel Alps, roughly east of its larger brother, the Großer Rettenstein.

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  Summit cross on the Großer Rettenstein. Behind: the Kleiner Rettenstein.
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  The Kleiner Rettenstein (centre) in winter from the Pengelstein
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  The Kleiner Rettenstein in winter seen from the Resterhöhe
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  The southeast face of the Kleiner Rettenstein