Lanín National Park: Volcano, Lakes and Araucaria Forests

Lanín National Park covers 412,000 hectares of Neuquén Province in Argentine Patagonia, and its namesake volcano rises 3,776 meters on the Chilean border. Entry costs ARS 35,000 for foreign visitors as of June 2026, charged only at specific gates — the volcano area, Lago Huechulafquen, the Tromen sector and the hot springs — while driving the Road of the Seven Lakes through the park is free. Fees are indexed to inflation and subject to change, so confirm current rates on the official Administración de Parques Nacionales site before you travel.

The park is the third largest in Argentina's national park system and the only one co-managed with Mapuche communities, whose presence shapes everything from place names to the hand-painted signs at trailheads. More than 20 glacial lakes sit inside its boundaries, along with the country's largest stands of Araucaria araucana — the monkey puzzle tree, or pehuén — and 159 recorded bird species.

Getting There and Getting Around

Access towns and road routes

Three towns serve as gateways, and each opens a different side of the park. San Martín de los Andes handles the south, where Lago Lácar laps at the town edge and the famous Ruta de los Siete Lagos begins. Junín de los Andes, 40 kilometers east along Ruta 234, is the northern approach and the standard start for the volcano climb. Aluminé, further north again, is the base for the remote pehuén forest sector and the multi-day Quillén–Rucachoroi traverse.

Chapelco airport (San Martín de los Andes) is the closest air link, with seasonal flights from Buenos Aires. Most travelers instead fly to Bariloche or Neuquén city and take a long-distance bus; both cities have daily services to all three gateway towns. Buses between San Martín and Junín take about 46 minutes and cover 34 kilometers.

Driving inside the park

Roads inside the park are mostly gravel, and this matters more than any guidebook suggests. Ruta 62 toward Laguna Verde and the Queñi area is graded but washboarded in stretches; a standard car manages in dry weather, but low clearance becomes a liability after rain. There is no public transport to any trailhead. In the lake districts, park rangers can radio for a taxi if you're stranded — a service worth knowing about if you hike one-way.

What to See and Do

The volcano ascent

Climbing Lanín is a two- to three-day affair from the north route, starting near the Tromen pass about 110 kilometers from San Martín de los Andes. Since October 2024 the park requires an online reservation 72 hours in advance, with a daily cap of 60 people across the refuges and tent sites. Crampons and an ice axe are mandatory, and anyone without prior mountaineering experience must hire a licensed guide. Registration itself is free; the reservation is the binding step.

Lakes, beaches and the Chachín waterfall

Lago Huechulafquen stretches roughly 30 kilometers along the volcano's base, with black volcanic sand beaches that stay quiet even in February if you walk 20 minutes from the main access. Lago Lácar, Lago Paimún and Lago Nonthué round out the southern circuit. The 30-meter Cascada Chachín pours through Valdivian rainforest — the same wet, mossy forest found in Chile — and is reachable by car on a gravel road or by catamaran across Lago Lacar from San Martín de los Andes.

Day hikes and the Hua Hum forest

The Sendero Hua Hum runs 3 kilometers one way from the border post at the Hua Hum pass (640 meters) to a mirador over Lago Nonthué, passing through araucaria and coihue with sphagnum moss underfoot. Morning fog lingers until about 9:30, which makes an early start worthwhile. Shorter walks around Lago Lácar and the arrayán forest near the Quila Quina beach suit travelers with half a day. Bring cash: the Hua Hum booth operates on an honor system with no card reader.

When to Go and What to Know

Seasons

December through March is warm and stable, the window for beaches, kayaking and the volcano ascent. Snow sports run June to September, mostly around the Chapelco ski area near San Martín. Autumn — March and April — brings lenga forests turning red and gold, and far fewer people on the trails. From April onward the weather turns unpredictable, with fast-moving storms and overnight frosts even at lake level.

Rules that catch visitors out

Camping is permitted only in marked sites; Queñi, for example, has 28 numbered parcels with a fire ring and table each, capped at six people per parcel. Fires are allowed only in designated spots. Pets and drones are banned throughout the park. Pack out all waste — there are no bins at trailheads. Swimming should stay parallel to the shore, and boats may only beach at authorized beaches.

Frequently Asked Questions

Do I need to book the Lanín volcano climb in advance?

Yes. Reserve online at least 72 hours before your start date, and plan around the 60-person daily cap across refuges and camping areas. You'll also need crampons, an ice axe, and a licensed guide if you lack mountaineering experience.

How much does it cost to enter Lanín National Park?

Foreign visitors pay ARS 35,000 as of June 2026, while Argentine residents pay ARS 15,000 and Neuquén province residents ARS 8,000. The fee applies only at specific gates — the volcano zone, Huechulafquen, Tromen and the hot springs — and driving through on the Seven Lakes route is free.

Can I visit without a car?

It's difficult. No public transport reaches any trailhead, so you'll need a rental car, a taxi, or a guided tour. Buses connect the gateway towns of San Martín de los Andes, Junín de los Andes and Aluminé, but that's where public transit ends.

Which town should I base myself in?

San Martín de los Andes suits lake beaches, the Chachín waterfall and the Seven Lakes drive. Junín de los Andes is better for the volcano and the Huechulafquen beaches. Aluminé works for the northern araucaria forests and longer backcountry routes.

Are pets and drones allowed?

Neither is permitted anywhere in the park. Fires are restricted to designated fire rings, and camping is only allowed at marked sites such as the 28 parcels at Queñi.