Loučná, Mountain summit in Northern Bohemia, Czech Republic.

Wieselstein (Czech: Loučná) is the highest summit of the eastern Ore Mountains at 956 m, rising directly above the drop to the North Bohemian Basin. Its rounded top is a small plateau with two granite outcrops, two wooden crosses on the lower southern rock, and birch and beech woods slowly giving way to replanted spruce.

The summit lies in the Fláje game reserve, where Wapiti deer were bred from 1848. In the 1950s the Czechoslovak army used an iron observation tower on the ridge, and foundations of army buildings and a panel road remain. A blue-marked spur to the summit was created in the late 1990s.

The Czech name Loučná and the German Wieselstein both appear on maps and trail signs. From 2000 to 2012 the summit hosted the Loučná 956 cycling and cross-country skiing race, named after the mountain's 956-metre height. Two wooden crosses stand on the lower southern granite rock where the marked trail ends.

The summit lies inside a 1,980-hectare game enclosure open to the public only in July and August, through individual gates. A blue-marked route runs from Litvínov and Meziboří to the highest accessible point at the fence; another blue route starts at Dlouhá Louka. In winter the climb is possible on cross-country skis.

The summit plateau holds two granite outcrops; two wooden crosses stand on the lower southern rock, where a marked branch of the blue trail from Litvínov via Meziboří ends. The higher northern rock, the true summit, lies inside the Fláje game enclosure and carries a triangulation point with a collapsed wooden tower.