Klebiškis Hillfort, also known as Pakiauliškis Hillfort, is a significant archaeological site located in Klebiškis village, Prienai district, in the Šilavotas eldership. The hillfort and its accompanying settlement can be reached by traveling through the western part of Klebiškis village towards the north; the hillfort is on the left side of the road, 30 meters before the road turns right. Nearby, there is also the Klebiškis Chapel.
The hillfort is situated on the right bank of the Kiauliškė stream. Today, only the rampart and ditch of the hillfort remain, as the former platform to the northwest was eroded by the stream, leaving no precise data about its size
and shape. The rampart, which is 13 meters wide, rises 20 meters above the stream level. Its eastern slope, which is 7 meters high, descends into a ditch that is 14 meters wide and 2 meters deep, with parts of this ditch still visible in the southwestern part of the hillfort. Unfortunately, the western to northwestern part of the rampart has collapsed, and the slopes have started to erode. On the northwestern slope, at a depth of about 30–40 cm, layers of stones, up to 20 cm in diameter, and clay can be seen. The northwestern slope of the rampart is overgrown with deciduous trees, while the western slope has been cut, and the other slopes are covered with grass.