Kokšín

Kokšín is a modest but historically and geologically rich hill in the Brdy range, rising above the village of Hořehledy, part of the town of Spálené Poříčí in the Plzeň-South district of the Czech Republic. Covering 20.63 hectares, the nature reserve protects the northern slope of the hill along with remnants of natural beech and fir-beech forest, including impressive beech trees over 200 years old.

Why visit Kokšín?

The hill reaches an elevation of 684 metres and forms a distinctive landmark in the landscape of the southern Brdy Hills. It appeals to hikers who want more than scenery — every rocky outcrop and forest clearing here carries a layer of human and geological history stretching back thousands of years.

What does the nature reserve protect?

Established in 1955, the reserve preserves remnants of near-natural forest communities on the hill's northern side. Alongside centuries-old beech trees, the undergrowth includes notable species such as moonwort. Since 2016 the reserve has formed part of the Brdy Protected Landscape Area (CHKO Brdy), sitting at its southwestern edge. In the 1960s, changes in forest management introduced tree species not native to this habitat, and conservation efforts today focus on restoring the forest's original natural composition.

What history is hidden on the summit?

The flat top of Kokšín bears the remains of a hillfort resembling a stone rampart. It was most likely built during the Hallstatt period, meaning it dates back more than 2,500 years. Evidence suggests the settlement was connected to iron ore mining and processing — the surrounding metabasalts are notably rich in iron ore, and mining activity in the area has ancient roots.

What does the geology reveal?

The bedrock of the reserve consists of dark grey-green metabasalts (spilites) from the Upper Proterozoic, whose weathering produces rock debris and characteristic block streams (stone rivers). These volcanic rocks are rich in iron ochre and hematite, and also contain vanadium, chromium, silver and possibly traces of gold — which explains why mining here dates back to antiquity. The site also includes silicites with well-preserved stromatolite textures, pointing to a biogenic origin, estimated to be between 900 and 560 million years old.

Getting there and practical notes

Kokšín lies within the cadastral territory of Hořehledy, administratively part of Spálené Poříčí. It is a popular destination for day hikes from surrounding villages, with trails leading to the summit combining scenic views with the chance to see both the hillfort remains and the striking rocky block streams along the slope.

Frequently asked questions

What is Kokšín? It is a hill and nature reserve in the Brdy range, within the municipality of Spálené Poříčí, protecting natural beech forest as well as traces of ancient settlement and iron ore mining.

How large is the reserve and when was it established? The reserve covers 20.63 hectares and was declared in 1955.

What is the main attraction here? The combination of beech trees over 200 years old, the remains of a Hallstatt-period hillfort, and the striking geology — metabasalts and stromatolite fossils.

Is Kokšín part of a larger protected area? Yes, since 2016 the reserve has been part of the Brdy Protected Landscape Area (CHKO Brdy).