Hudson Volcano

Hudson Volcano is a remote, glaciated stratovolcano in the southern Chilean Andes, located in the Aysén Region. It is known for powerful explosive eruptions and extensive glacial cover.

The site is primarily of interest to volcanologists, glaciologists and remote-area trekkers; there are no developed visitor facilities and access is challenging because of glaciers, rough terrain and weather. The volcano’s summit area and caldera show deposits and landscape scars from past explosive activity.

Hudson has produced several strong eruptions in the 20th century, culminating in a significant explosive event in 1991 that had widespread ashfall and regional impacts. Geological studies emphasise its explosive behavior and interactions with ice.

Located in a sparsely populated segment of the southern Andes in Chile’s Aysén Region, the volcano sits well inland from the Pacific coast amid glaciated mountains. The area is remote with limited road access and is typically visited only by specialised expeditions.

• 1991 eruption: The volcano produced a major explosive eruption in 1991 that dispersed ash widely over southern Chile and Argentina and was one of the largest recent eruptions in southern South America.

• Hudson Volcano is remote Patagonian terrain-check the current volcanic alert level with Chile's SERNAGEOMIN and only plan visits with guides experienced in glacial/volcanic environments.
• Attempt visits in the austral summer (December-March) when access windows and weather are most reliable, and build in extra days for weather‑related delays.
• Because many approaches are lengthy or by sea, base logistics on nearby regional towns (e.g., Coyhaique or coastal ports) and expect multi‑day travel; coordinate transport and emergency plans with your guide.