The hillfort was established on a promontory on the left bank of the Lapainia River. There are no data about the elongated north-south-oriented platform, as it was eroded by the Lapainia in the late 19th to early 20th centuries. What remains is a rampart on the southern side, 17 meters long, 5 meters high, and 12 meters wide, with a 13-meter-wide, 1-meter-deep ditch behind it. The slopes are steep, 15 meters high.
The rampart is overgrown with young bushes. In 1994, the slopes of the hillfort, which were being eroded by the Lapainia, were reinforced with stone groins.
The hillfort is also known as Lapainia or Vilūnai Hillfort.
At the southern and western foothills,
there is a 1.3-hectare settlement where grooved and rough pottery has been found.
The hillfort dates back to the 1st millennium to the early 2nd millennium.
There is a legend that the hillfort was built by French soldiers.
To reach it, take the Kruonis-Jieznas road (road No. 129) and turn towards Migonys. From there, turn left (south) for 900 meters towards Purvininkai. After the last homestead on the right, turn right (west) and drive 300 meters. The hillfort is 150 meters to the right (north) of the path.
The site is overgrown with bushes and trees, there are no directional signs, but there is an information board, and no proper access road exists.