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Mount Sinabung Alert Rise Closes Lau Kawar Lake to Visitors

An indefinite closure of a popular North Sumatra lake and campsite follows a jump in volcanic activity that authorities say warrants a wider safety exclusion zone.

Qontaktly Editorial·August 31, 2026·3 min read
Key takeaways
  • Lau Kawar Lake and a campsite in Kuta Gugung village have been closed indefinitely since August 19 due to rising volcanic activity at Mount Sinabung.
  • Sinabung's alert level has moved from Level I to Level II, with a recommended exclusion zone of 3 kilometers around the crater.
  • Authorities also warn of mudflow risk near riverbanks in the affected area.
  • Sinabung has a documented history of major eruptions, including deadly events in 2013 and a significant ash and pyroclastic event in 2021.
  • Travelers and hosts should monitor official volcanic hazard updates and prepare alternative plans while the closure remains in effect.

Lau Kawar Lake and Campsite Shut Indefinitely After Sinabung Alert Rises

Travelers planning a visit to Lau Kawar Lake in North Sumatra's Karo regency will need to reroute their itineraries for now. Local authorities closed the lake and an adjacent camping ground in Kuta Gugung village, Naman Teran district, after volcanic activity at nearby Mount Sinabung intensified and the volcano's official alert level was raised. The closure took effect on August 19 and has no set end date.

What Triggered the Closure

The decision followed a formal recommendation from the Volcanology and Geological Disaster Mitigation Centre's Sinabung monitoring command post. According to Karo Youth Affairs, Sports and Tourism Agency head Juni Antomi Kemit, the regency administration acted on that guidance when it shuttered both sites.

Mount Sinabung's status moved from Level I to Level II on the Indonesian volcanic alert scale. At Level II, authorities advise the public to avoid all activities within a 3-kilometer radius of the crater and urge extra caution near riverbanks, where mudflows can develop quickly after eruptive episodes.

Sinabung's History of Disruption

This is not the first time Sinabung has forced closures in the region. The volcano has been intermittently active since 2010, with particularly destructive eruptions in 2013 and again in 2021. During the 2021 event, volcanic ash reached approximately 4.5 kilometers in height and pyroclastic flows extended roughly 1 kilometer from the summit. The current uptick in activity is a reminder that Sinabung remains one of Indonesia's more restless volcanoes, and that conditions around it can shift with limited warning.

What Travelers Should Do Now

Anyone with upcoming plans that include Lau Kawar Lake or the Kuta Gugung camping area should contact local accommodation providers or tour operators before traveling to confirm current access. The closure is indefinite, meaning it could be lifted quickly if activity subsides or extended further if the alert level rises again. Monitoring updates from Indonesia's official geological hazard authorities is the most reliable way to stay current.

The broader Karo regency still offers considerable appeal, including Berastagi town and its surrounding highland scenery, but visitors should stay well outside the 3-kilometer exclusion zone around Sinabung's crater and avoid low-lying river corridors in the area.

Why It Matters for Hosts

Independent operators in Karo regency, particularly guesthouses, homestays, and tour guides who have built packages around Lau Kawar Lake or Sinabung-area trekking, should update their booking pages and guest communications immediately to reflect the closure. Proactive transparency reduces last-minute cancellations and builds trust. It is also worth preparing an alternative itinerary that highlights other highland attractions in the area, so guests who do arrive have a satisfying experience without approaching restricted zones. Keeping a direct line open with the local tourism agency for updates will help operators respond quickly when conditions change.

The details in this post were first reported by The Straits Times. This post is published by the Qontaktly travel blog.

First reported by straitstimes.com.

Keep reading

Mount Sinabung Erupts in North Sumatra: Flights Disrupted, 2,400+ EvacuatedA Monday eruption sent ash 3.5 km skyward, triggering a raised alert level and widespread travel disruption around Karo Regency.Mount Sinabung Erupts Again in North Sumatra, Alert Level RaisedThe volcano's first eruption in five years has prompted exclusion zones and the closure of a popular lakeside destination in Karo regency.
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