Campo de Piedra Pómez: Argentina's White Pumice Desert

A 25-kilometer field of white pumice sits at 3,000 meters above sea level in the Catamarca Puna, about 550 kilometers from San Fernando del Valle de Catamarca. That distance explains why the formations — some reaching 4 meters high — still feel undiscovered compared to Argentina's better-known Patagonian sights.

The Campo de Piedra Pómez is a protected natural area covering roughly 75,000 hectares in the Antofagasta de la Sierra department. It was created by eruptions of the Blanco volcano around 100,000 years ago, then sculpted by wind into ridges, fins, and hollows that change color from white to pale pink as the sun moves.

Getting There and Getting Around

By road from Catamarca

The journey starts on paved roads but the final stretch is ripio (gravel) and sand tracks. Most travelers base themselves in El Peñón, a village on provincial route 43 with basic hospedajes and a handful of local guides. From El Peñón, the pumice field is about 35 kilometers away. Antofagasta de la Sierra, the departmental capital, sits roughly 60 kilometers north of El Peñón and has more services, including a small hotel and a tourist information office.

A 4x4 vehicle is not optional. Sedans and standard rental cars cannot handle the soft sand and rocky sections, and the area has no gas station, cell signal, or water supply. If you drive yourself, go with a local guide anyway — the tracks are unmarked and the wind erases tire marks within hours. Local drivers in El Peñón know the routes and charge around ARS 25,000–35,000 per person for a half-day excursion, though rates vary by group size and season.

Tours and permits

Organized excursions leave from El Peñón and Antofagasta de la Sierra, usually in the morning. A typical tour lasts 4–6 hours and includes pickup, 4x4 transport, and a Spanish-speaking guide. Some operators combine the pumice field with the Carachi Pampa volcano and its lagoon, where flamingos sometimes feed. Book at least a day ahead in high season (September–November and March–April), when demand exceeds the limited number of vehicles.

Entry to the protected area is paid and, since June 2025, cash is no longer accepted. You must pay electronically — either online in advance or at the ranger station with a debit card or digital wallet. Foreign visitors pay a higher rate than Argentine residents; as of 2025, the foreign rate was around ARS 15,000 (about US$10–12 at the time), but fees are subject to change — check the official Catamarca tourism site for current rates. Children under a certain age often enter free, but confirm with your tour operator.

On foot inside the field

Vehicles park at the edge of the formations. From there, you walk. Circuits are not signposted, which is another reason to keep a guide. The main walk is short — under 2 kilometers round trip — but the uneven pumice surface and the altitude make it feel longer. Stay on established paths; the pumice crust is fragile and footprints can last for years in the dry air.

What You'll See and How to See It

The formations

The pumice field looks like a frozen sea. Wind has carved the soft volcanic rock into parallel ridges, some sharp enough to cut a carelessly placed hand. The color shifts through the day: blinding white at noon, warm pink at sunrise and sunset. Photographers should aim for early morning or late afternoon, when low light exaggerates the shapes. Midday light flattens everything.

The tallest formations reach about 4 meters, but most are waist- to shoulder-height, creating a labyrinth you can wander through. The ground is a mix of pumice gravel and larger blocks — sturdy shoes are essential. The area is completely exposed, with no shade and no water.

Beyond the pumice

Most tours include stops at nearby attractions. The Carachi Pampa volcano is a black cone rising from the pale desert, and its lagoon attracts flamingos and other waterbirds. The Salar del Hombre Muerto, a vast salt flat, is sometimes on the route; walking on its crunchy salt crust is a strange counterpoint to the pumice field. The white dunes (Dunas Blancas) near El Peñón are another common add-on — fine silica sand that behaves like snow underfoot.

The altitude factor

At 3,000–3,050 meters, oxygen is thin. You will feel it climbing even a short slope. Spend at least one night in El Peñón (2,900 meters) or Antofagasta de la Sierra (3,300 meters) before visiting to help acclimatize. Drink more water than you think you need, and avoid alcohol the night before. If you have heart or respiratory conditions, consult a doctor before going.

When to Go and What to Expect

The best months are September to November and March to April. Temperatures are moderate — daytime highs of 15–20°C — and the tracks are usually dry. April to November is also reliable, but winter nights can drop below -10°C. Summer (December–February) brings occasional rain that can make the tracks impassable; some tours don't run at all after heavy precipitation.

Wind is a constant. It picks up in the afternoon, so morning visits are more comfortable and give you clearer views. Carry sunglasses and a buff or scarf — pumice dust gets into everything. Sunscreen is non-negotiable at this altitude, where UV radiation is intense even on overcast days.

The protected area limits visitor numbers to reduce impact. You may see only a handful of other vehicles all day. That solitude is part of the appeal, but it also means you should carry everything you need: water, snacks, sun protection, and a basic first-aid kit. There are no facilities inside the field — no toilets, no shelter, no trash bins. Pack out all waste.

Frequently Asked Questions

How much does it cost to visit Campo de Piedra Pómez?

Entry is paid and must be done electronically — cash is not accepted since June 2025. Foreign visitors pay around ARS 15,000 (roughly US$10–12), while Argentine residents pay less. Tours from El Peñón cost extra, typically ARS 25,000–35,000 per person. Fees change, so confirm current rates on the official Catamarca tourism website.

Can I visit without a guide?

Technically yes if you have a capable 4x4 and experience in remote high-altitude terrain, but it's not recommended. The tracks are unmarked and often erased by wind, and there's no cell signal. Local guides in El Peñón know the routes and the rules of the protected area. Most visitors book a tour.

What's the best time of day to see the formations?

Early morning or late afternoon. Low sun angles create shadows that emphasize the ridges and fins, and the rock takes on pink and gold tones. Midday light is flat and the wind is stronger. Tours usually leave El Peñón around 8–9 a.m., which puts you there in good light.

How long do you need at the field?

Most tours spend 1–2 hours walking among the formations, plus 2–3 hours of driving and stops at nearby sights like the Carachi Pampa lagoon. A half-day (4–6 hours) is standard. If you're a photographer, consider a private tour to allow more time on site.