Herdísarvík

Herdísarvík is a coastal nature reserve on the south shore of the Reykjanes peninsula in southern Iceland, east of Krýsuvík near the Selvogur district. Protected as a friðland in 1988, it covers about 42.18 km² (4,218 hectares) of lava-strewn coastline where the Herdísarvíkurhraun lava flows meet the North Atlantic. ^[1] The reserve takes in a brackish coastal lagoon, Herdísarvíkurvatn, held back from the sea by a storm-thrown gravel beach, together with sea cliffs, the slopes of Mt Herdísarvíkurfjall, and the ruins of the abandoned Herdísarvík farm. The poet and entrepreneur Einar Benediktsson lived here during his final years, and the land is owned by the University of Iceland (Háskóli Íslands), to which he donated it in 1935.

The reserve supports rich birdlife typical of Iceland's volcanic south coast, where the sheltered lagoon and open sea meet a rugged lava shoreline. Herdísarvíkurvatn, the brackish coastal lake, has long held brown trout and supports waterfowl and wading birds, while the sea cliffs and offshore rocks provide nesting ledges and roosts for seabirds such as fulmars, gulls, and other coastal species. ^[1] Historically the surrounding farmland was sustained by the sea's bounty, including seabird and seal hunting along the coast. The mix of freshwater lagoon, brackish transition zone, and exposed marine habitat creates a productive edge environment that draws both resident and migratory birds through the seasons.

Vegetation at Herdísarvík is shaped by young lava, salt spray, and a cool maritime climate, producing the sparse but distinctive plant communities of Iceland's coastal lava fields. Mosses and lichens are the pioneer colonizers of the rough Herdísarvíkurhraun flows, gradually building thin soils that support grasses, sedges, and hardy dwarf shrubs in sheltered hollows. Salt-tolerant coastal plants fringe the lagoon and beach, while richer growth clings to the more sheltered slopes of Herdísarvíkurfjall. The reserve has botanical interest tied to its varied microhabitats — the interaction of young lava, coastal salt spray, and the sheltered mountain slopes creates niches that support a notable range of bryophytes and vascular plants for such a compact coastal site.

Herdísarvík lies on the volcanically active Reykjanes peninsula, and its landscape is dominated by the Herdísarvíkurhraun, a set of three partially overlapping lava flows that erupted from craters of the Brennisteinsfjöll volcanic system and reached the sea. ^[1] The rugged basaltic lava forms much of the coast, ending in low sea cliffs battered by Atlantic surf. Behind a storm-built gravel and boulder beach lies Herdísarvíkurvatn, a shallow coastal lagoon cut off from but influenced by the ocean. Mt Herdísarvíkurfjall rises immediately inland, its slopes marked by older lava tongues from prehistoric eruptions. The wider peninsula remains geologically restless, with the nearby Reykjanes eruptions of 2021 to 2024 illustrating the ongoing volcanism that built this coastline.

Herdísarvík has a cool, wet, and windy subpolar oceanic climate moderated by its exposed position on the open Atlantic coast. Summers are mild, with temperatures typically in the range of about 10 to 13°C, while winters are relatively mild for the latitude but stormy, hovering near or just above freezing thanks to the surrounding sea. Strong onshore winds and frequent rain are characteristic year-round, and powerful winter storms drive surf high onto the beach that dams the coastal lagoon. Cloud cover is common, and the low-lying lava coast offers little shelter, so conditions can change quickly. The best weather for visiting generally comes in the long-daylight summer months.

The name Herdísarvík comes from folklore, referring to Herdís, a legendary figure said to have lived at the bay, whose sister Krýs was associated with nearby Krýsuvík; a well-known tale describes conflict between the two. ^[1] From the Middle Ages into the 1920s the site served as a seasonal winter fishing station, where crews rowed open boats after cod and other fish; the remains of huts and low stone walls used for drying fish are still visible, and these ancient fishing-station ruins were declared protected relics in 1973. ^[1] The farm itself was a comparatively wealthy holding, drawing income from fishing, trout in the lagoon, seabird and seal hunting, and valuable driftwood gathered along the shore in a country largely without native timber.

Herdísarvík is closely tied to the poet, politician, and entrepreneur Einar Benediktsson (1864–1940), one of Iceland's most celebrated literary figures, who moved to the isolated farm in 1932 and spent the last years of his life there, dying at Herdísarvík on 12 January 1940. ^[1] In 1935 he donated the land to the University of Iceland (Háskóli Íslands), which still owns it. ^[2] His companion Hlín Johnson continued to run the farm until 1958. The area was formally protected as a nature reserve (friðland) in 1988, recognizing both its natural values, coastal lava, lagoon, and distinctive flora, and its cultural and historical significance as Einar Benediktsson's final home.

The reserve's main draws are its dramatic coastal scenery and its literary and archaeological heritage rather than developed trails. Visitors come to see the abandoned Herdísarvík farm associated with Einar Benediktsson, the storm-beach and brackish lagoon of Herdísarvíkurvatn, and the low sea cliffs where the Herdísarvíkurhraun lava meets the Atlantic. The visible ruins of the old winter fishing station, with its hut foundations and fish-drying walls, are a tangible link to centuries of coastal life. ^[1] Ancient walking routes cross the reserve, including historic paths linking Herdísarvík with Krýsuvík over the lava, offering rewarding walks through raw volcanic terrain with sweeping ocean views.

Herdísarvík lies along Route 427 (Suðurstrandarvegur), the south-coast road between Þorlákshöfn and the Krýsuvík area, roughly 50 km from Reykjavík, making it an accessible stop on a Reykjanes coastal drive. ^[1] Historically the site could only be reached on foot, by horse, or by boat, but the modern road now passes close by. The reserve is undeveloped, with no visitor center, marked trails, or services on site, so travelers should come self-sufficient and prepared for exposed coastal weather. As a protected nature reserve on University of Iceland land, it is best explored respectfully on foot, keeping to existing tracks and avoiding disturbance to the ruins, lagoon, and vegetation.

As a friðland protected in 1988, Herdísarvík is managed to conserve its coastal lava ecosystem, the Herdísarvíkurvatn lagoon, sea cliffs, and distinctive flora, alongside its cultural heritage. ^[1] Protection rules emphasize safeguarding vegetation and avoiding disturbance to wildlife and to the historic fishing-station ruins, which have held protected-relic status since 1973. ^[2] University of Iceland ownership adds a scientific and educational dimension, and the reserve's botanical diversity — from pioneer bryophytes on the Herdísarvíkurhraun lava to salt-tolerant coastal plants around the lagoon — underscores the value of preserving its plant life. Ongoing volcanic activity on the Reykjanes peninsula, including recent eruptions nearby, is a reminder that the reserve sits within a dynamic landscape where natural processes continue to shape both habitats and management priorities.