Kloč

Kloč is a forested hill in the Czech Central Uplands (České středohoří), rising about 1.5 km south-southeast of the village of Kostomlaty pod Milešovkou in the Teplice district, Ústí nad Labem region. At 737 metres, it is the third-highest summit in the entire mountain range, surpassed only by nearby Milešovka, roughly 4 km to the east. Kloč has no waymarked trail leading directly to its top, which makes it more of a destination for off-path hikers and anyone curious about the volcanic geology behind the region's distinctive hills.

How did the hill form?

Kloč is a textbook example of the geology that shapes the Czech Central Uplands: it is an exposed neovolcanic laccolith made of sodalitic trachyte, a volcanic rock that solidified underground and was gradually revealed as the surrounding softer material eroded away over millions of years. The slopes show clear signs of slope processes and slab-like rock fracturing, where the trachyte splits into flat, irregular blocks rather than rounded boulders. Mixed deciduous and coniferous woodland covers the hill almost from its base to the summit, giving it a dense, wild character compared to more manicured lookout points nearby.

How do you get to the top?

No official hiking trail runs all the way to the summit of Kloč. The closest waymarked route is a blue trail that crosses the saddle between Kloč and the neighbouring peak of Kleč; from there, an unmarked forest track branches off toward the top. This makes Kloč a hike for visitors comfortable with off-trail navigation, ideally with a map or GPS, since the dense summer foliage can make orientation tricky. At the very top, hikers can find a small stacked stone pyramid, believed to be a remnant of the base of a former triangulation point once used for surveying the landscape.

What is there to know about its history?

For decades, Kloč and the surrounding hills sat within a restricted military area, used by the army — including Soviet forces stationed in Czechoslovakia — which kept the region effectively closed to hikers for a long stretch of the 20th century. Only after the troops withdrew did the area reopen to visitors and locals alike. At the foot of the hill lie the ruins of Kostomlaty Castle, tying the site to the medieval settlement history of the Czech Central Uplands. Older maps also recorded different names for the summit: it appeared as Pařez on state maps issued between 1968 and 1995, and as Kloc on a 1952 map, a reminder of how Czech cartography has shifted over the decades.

When is the best time to visit?

Spring and autumn are the most rewarding seasons for exploring the Kloč area, since the tree canopy is thinner and lets more light and views through, while temperatures stay comfortable for a longer forest walk. Summer brings dense foliage that limits visibility but offers welcome shade on the steeper stretches of the climb. In winter, the lack of marked trails and the possibility of icy patches on the steeper slopes make the hill a more demanding, less predictable destination.

Frequently asked questions

How high is Kloč? The hill reaches 737 metres above sea level, making it the third-highest peak in the Czech Central Uplands.

Is there a marked trail to the summit? Not directly. A blue-marked trail reaches the saddle between Kloč and the neighbouring Kleč peak, and an unmarked forest track continues from there to the top.

What was Kloč called in the past? Older maps list it as Pařez (1968–1995) and as Kloc (1952), before the current name became standard.

Are there other attractions nearby? Yes — the ruins of Kostomlaty Castle sit at the foot of the hill, and Milešovka, the highest peak of the whole range, rises less than 4 km away.