The Großer Rettenstein is a mountain with multiple peaks in the Kitzbühel Alps in Austria. The main summit reaches a height of 2,362 m. Although not the highest mountain in the Kitzbühel Alps, the Großer Rettenstein is the most striking in this range of otherwise gentle grass-covered mountains. It also has a mighty, craggy, summit block made of limestone, four hundred metres high, that stands atop base of grauwacke and primary rock. The Rettenstein is the dominating peak of the Spertental valley. Its isolated location also makes the summit an outstanding viewing point and it is therefore a popular destination.