Sierra de las Quijadas National Park: Red Desert Hiking Guide

Sierra de las Quijadas National Park protects 73,785 hectares of eroded red sandstone about 120 km northwest of San Luis city, reached via National Route 147 at kilometer 922. The drive from the provincial capital takes roughly 90 minutes on paved road, then 6 km of gravel to the Potrero de la Aguada viewpoint. Entry has recently been free of charge, though fees are subject to change — check the official site for current rates.

The park was created in 1991 to shield the dry Chaco scrub, archaeological sites once used by the Huarpes, and a fossil bed holding dinosaur and pterosaur remains. Most visitors come for one thing: the natural amphitheatre called Potrero de la Aguada, where wind and rare rain have carved cliffs, spires and gullies out of ochre and crimson rock. It looks less like Argentina than like a scaled-down Utah.

Getting There and Orientation

Driving from San Luis, Merlo or San Juan

The entrance sits on RN 147 before its junction with RN 20. From San Luis city it is 116 km; from Villa de Merlo, take RP 5 to Quines, then RN 20 and RN 147. San Juan is about 215 km away and Potrero de Funes 131 km. The last stretch is gravel — compact in dry weather, slippery after rain.

There is no fuel, no food and no drinking water at the park or along the access road. Fill up and stock up in San Luis or Quilmes (140 km) before you set out. This is the single most common mistake I see mentioned by returning visitors.

Tours and Public Transport

No scheduled bus runs to the entrance. Day tours leave from San Luis city, typically 6 hours round trip including a 90-minute guided hike, hotel pickup and an English-speaking guide; park entry is sometimes bundled separately. Independent travelers without a car usually hire a remis in San Luis for the day.

Trails, Viewpoints and What You Actually See

The Five Marked Trails

The park maintains five signposted trails, three self-guided and two requiring a licensed guide. Difficulty tracks distance, gradient and surface — loose scree on the upper sections makes the guided routes noticeably tougher than the self-guided ones.

Hornillos de Hualtarán is the short entrance trail leading to an archaeological site. The Guanacos trail takes about three hours round trip and needs registration with the park ranger first. The Farallones route is the longest at close to five hours and widely considered the most scenic. Guided excursions must be booked in advance with the park; don't assume you can turn up and join a group.

Potrero de la Aguada and the Miradores

The 6 km dirt road from the entrance climbs west to a viewpoint over Potrero de la Aguada, a depression that collects runoff from much of the park and draws wildlife. Andean condors, gray foxes, maras and the occasional puma have all been recorded here. A small museum and toilets sit near the parking area; there is no potable water.

Shadow is almost nonexistent on the upper trails. Bring more water than feels reasonable, a hat and high-factor sunscreen — rangers repeat this constantly during heat waves, and the warning is not ceremonial.

When to Go, Hours and Practical Rules

Season and Temperature

The climate is semi-arid. Summer maximums can hit 45°C, and January averages around 31°C, while July minimums drop to about 3°C. April through October or November is the comfortable window; spring is especially good for hiking. Opening hours shift seasonally — roughly 8:00 to 20:00 January to March and 9:00 to 19:00 April to December, with last entry around 17:00. Confirm before traveling, because summer heat sometimes forces changes.

Fees, Guides and Safety

Rates have fluctuated in recent years, ranging from free entry to a few hundred pesos for non-residents, so treat any figure as provisional. Children under 5, retirees, disabled visitors and local residents have historically paid nothing.

Tell the ranger your route before setting out and hire a local guide for the canyon trails. The maze of ravines is genuinely disorienting, and phone signal is unreliable. Guided groups are capped, so reserve days ahead in high season.

Frequently Asked Questions

How long does it take to visit Sierra de las Quijadas?

Allow a full day from San Luis — about 90 minutes each way plus three to five hours on trails. A half-day trip only covers the viewpoint and the shortest self-guided walk.

Do I need a guide to hike in the park?

Two of the five trails require a licensed guide, including the long Farallones route. The other three are self-guided, but you must register with the ranger first.

Is there anywhere to eat or sleep inside the park?

No. There is no accommodation, restaurant, fuel or drinking water at the park or on the access road. The nearest services are in San Luis and Quilmes, both roughly 120–140 km away.

What is the best month to visit?

April to October. Summer temperatures can reach 45°C with almost no shade, which makes hiking exhausting and occasionally unsafe.

Can I visit without a car?

Not easily. There is no public transport to the entrance, so your options are a guided day tour from San Luis or a hired remis for the day.