evidence: Klek is a mountain located in the south of Gorski kotar, on the edge of Velika Kapela near the town of Ogulin. It stretches in the northwest-southeast direction, and its slopes descend towards the valley of the river Dobra and the Ogulin field. The most important peak is Veliki Klek, 1182 m high, and slightly lower is Mali Klek, which is 1085 m high. Due to its natural and geomorphological richness, part of the mountain is protected as a biological and geomorphological park. Klek is of special importance in the history of Croatian mountaineering. It was the ascent to Klek in 1874 that encouraged the university professor Dr. Johannes Frischauf from Graz to found the Croatian Mountaineering Society. Also, the rock below Veliki Klek served as the first school of Croatian alpinists.