Aroe Jari Cave: Brazil's Largest Sandstone Cavern

Aroe Jari Cave stretches 1,550 meters through sandstone in Chapada dos Guimarães National Park, making it the largest cave of its kind in Brazil. Visitors access it via an 8 to 10 km hiking circuit on the Água Fria farm, about 29 km from the town of Chapada dos Guimarães along the MT-251 and MT-450 roads. The cave system includes the Blue Lagoon Grotto, Kiogo Brado Cave, and Pobe Jari Cave, plus formations like the Stone Bridge and Balance Rock.

Getting There and Practical Logistics

The cave sits inside the Aroe Jari Tourist Complex on Fazenda Água Fria, a private farm within the national park boundaries. From Chapada dos Guimarães town center, drive about 25.5 km toward Campo Verde on the MT-251, then turn right onto an unpaved road for another 11.8 km to reach the visitor center. The final stretch is sandy and can be rough in wet weather — a 4x4 is not mandatory but low-clearance cars struggle after heavy rain.

Most travelers join a guided tour from Chapada dos Guimarães or Cuiabá, which includes hotel pickup and transport in a bus or minibus. The drive from Cuiabá takes roughly 1.5 hours. Independent travelers can drive themselves, but the sandy access road and limited signage make a local driver a sensible choice. The complex is open daily from 8:00 to 16:00, though some sources list 8:00 to 13:00 for the cave circuit — confirm current hours when booking.

Entrance Fees and Booking

Entry to the Aroe Jari complex costs around 265 BRL per person, which typically includes lunch and internal transport by tractor to the cave area. Guide fees may be separate. The visit requires a credentialed guide — you cannot explore the caves independently. Book at least two days in advance, especially on weekends and during the dry season (May to September) when demand peaks. Fees are subject to change — check the official site or your tour operator for current rates.

The Hiking Circuit

The full circuit covers 8 to 10 km and takes 4 to 6 hours, including stops at multiple caves and a swim. A paid shuttle runs from the visitor center to the cave entrance, saving about 2 km of exposed walking under the sun. I recommend taking it — the trail between the entrance and the caves offers little shade, and you will want your energy for the cave interiors. The terrain is easy to moderate, with some narrow passages and uneven footing. Wear closed-toe shoes with grip and bring a flashlight; helmets and gaiters are usually provided by tour operators.

What You'll See Inside the Caves

Aroe Jari means 'soul shelter' in the Bororo language, and the name fits. The main chamber is vast and flat-floored, with a stream running through it that forms the Blue Lagoon near the entrance — a natural pool with crystal-clear water that reflects blue off the rock walls when sunlight enters at the right angle. The effect is strongest in the morning during the dry season.

The complex includes several distinct caves. Kiogo Brado and Pobe Jari are smaller but no less interesting, with rock formations that resemble animals and human faces if you look closely. The Stone Bridge is a natural arch you can walk across, and the Balance Rock is exactly what it sounds like — a boulder perched in a way that seems physics-defying. One cave extends about 1.5 km, but flooding sometimes blocks the far end, forcing a detour. The last cave is still being studied, and visitors can only enter the first 150 meters.

The Blue Lagoon Grotto

The Gruta da Lagoa Azul is the highlight for many visitors. The lagoon sits inside a cave where a stream has carved a pool over centuries. The water is cold and clear, and swimming is allowed — a welcome relief after the hike. The blue color comes from light scattering through the water and reflecting off the pale sandstone. It is most vivid between May and September when the water is clearest and the sun is strong. Bring a swimsuit and a quick-dry towel.

Wildlife and Vegetation

The trail passes through cerrado vegetation — scrubby trees, cacti, and termite mounds. You may spot toucans, parakeets, and the occasional agouti. The cave itself is home to bats, which you will likely see clinging to the ceiling. Keep noise to a minimum and do not touch the animals. The farm also has a restaurant that serves regional dishes like rice, beans, and grilled meat; lunch is usually included in the tour package.

Best Time to Visit and What to Bring

The dry season from May to September is the best window. Trails are firm, the water is clear, and the cave interiors are less humid. June and July are particularly pleasant, with daytime temperatures around 28°C and cooler nights. The rainy season (December to April) brings slippery trails, flooded sections, and occasional closures — some tours do not run at all in February and March. August and September are still dry but hotter, with highs near 31°C.

Pack sunscreen, a hat, insect repellent, long pants, and a long-sleeved shirt for sun protection. A headlamp or flashlight is essential for the caves. Bring at least 1.5 liters of water per person — the heat is deceptive. Do not bring drones, bicycles, or alcohol. The tour is not suitable for children under 2, people with mobility impairments, or anyone with claustrophobia.

Frequently Asked Questions

How long does the Aroe Jari Cave tour take?

The full circuit takes 4 to 6 hours, covering 8 to 10 km. Most guided tours from Chapada dos Guimarães last about 8 hours door-to-door, including transport, lunch, and a swim stop at the Clock Waterfall.

Do I need a guide to visit Aroe Jari Cave?

Yes. The complex requires a credentialed guide for all visits — you cannot enter the caves independently. Tours can be booked through local agencies in Chapada dos Guimarães or online platforms, and they typically include transport, guide, and equipment like helmets and flashlights.

What is the entrance fee for Aroe Jari Cave?

Expect to pay around 265 BRL per person for entry, which usually includes lunch and internal tractor transport. Guide fees may be separate. Prices change, so confirm with your operator before booking.

Can you swim in the Blue Lagoon inside the cave?

Yes, swimming is allowed in the Lagoa Azul. The water is cold and clear, and the blue color is most intense during the dry season (May to September). Bring a swimsuit and towel.

Is the hike suitable for children?

The trail is easy to moderate, and older children who are comfortable walking 8 km can manage it. The tour is not recommended for children under 2 or anyone with mobility impairments. Claustrophobic travelers should skip the narrow cave passages.