Cachoeira da Formiga: Jalapão's Emerald Pool

Cachoeira da Formiga sits about 30 km from Mateiros in Tocantins, Brazil, and its main draw is a compact plunge pool roughly 8 meters wide and up to 2 meters deep, fed by the Rio Formiga. Entry costs R$50 per person for a day visit, and the final approach is a flat 300-meter walk that takes about 10 minutes — short enough for young children and older travelers with reasonable mobility.

Getting There and Orientation

Location and access roads

The waterfall lies between São Félix do Jalapão and the town of Mateiros, just off the TO-110. The last stretch is unpaved sand and dirt, and the final few hundred meters are rough enough that a standard rental car will struggle. A 4x4 is the sensible choice; most visitors either drive one or join a guided tour from Palmas, which is roughly 300 km away. The drive from Mateiros itself takes around 40 minutes in dry conditions.

The walk to the water

You park at a small clearing, pay at the entrance, and follow a wooden deck trail through typical Cerrado vegetation. The path is flat, sandy in spots, and shaded only intermittently — bring a hat even for this short walk. A detail worth knowing: there is Wi-Fi near the entrance area, which is rare in this part of Jalapão and handy if you need to send a message before losing signal deeper in the park.

Entry fees and what they cover

The standard day-use fee is R$50 per person, paid at the entrance. Camping is available for an additional R$30 per person, and children up to 6 enter free when accompanied by parents. Some older sources still list R$20, which reflects earlier pricing — fees are subject to change, so confirm the current rate with your guide or the entrance staff before you go. The land belongs to a quilombola community, and the entrance money supports local families and upkeep of the wooden decks.

What to Expect in the Water

The pool and its colors

The waterfall itself is modest — a drop of just under 2 meters — but the pool is the reason people come. Depending on the sun angle, the water shifts from deep emerald to a lighter turquoise, and visibility is usually excellent in the dry season. The pool is small enough that it can feel crowded when a few tour vans arrive at once; arriving before 9 am gives you the best chance of having it mostly to yourself.

Swimming conditions and safety

Depth reaches about 2 meters in the middle, and some visitors report spots closer to 2.5 meters. The current is generally gentle, but it picks up after heavy rain upstream. Non-swimmers should stay near the sandy shallows on the far side. There are no lifeguards, and phone signal is weak at the water itself, so keep an eye on children. The rocky edges can be slippery — water shoes are more useful here than flip-flops.

Facilities on site

A simple restaurant serves meals and cold drinks, and a handful of stalls sell local handicrafts, including items made from golden grass (capim dourado). Cold showers and running-water toilets are available near the camping area. There is no time limit on your stay during day-use hours, which makes this a good spot to linger rather than rush through.

Planning Your Visit

Best months and water conditions

The dry season from May to September is the reliable window. Water clarity peaks in May, June, and September, and the dirt roads are firmest then. July and August bring the heaviest crowds and holiday traffic. The rainy season from October to April raises water levels and can turn the access road muddy and rutted — the landscape is greener and the falls more powerful, but the drive becomes a real gamble.

How long to stay and what to combine

Most travelers spend one to two hours at the pool, plus the short walk each way. It pairs naturally with the fervedouros around São Félix do Jalapão, where groundwater pressure makes it nearly impossible to sink, and with the orange dunes near Mateiros. A three-day Jalapão loop from Palmas usually includes Formiga as a first or second-day stop, often combined with a morning visit to a local craft stall on the way in.

Practical packing notes

Bring at least 1.5 liters of water per person, high-SPF sunscreen, a dry bag for phones and keys, and a towel. The Cerrado sun is harsh even on overcast days. Cash helps for the entrance fee and small craft purchases, since card machines can be unreliable in remote spots. A light long-sleeve layer is useful for the drive, as some tours run with open-air seating.

Frequently Asked Questions

Do I need a guide to visit Cachoeira da Formiga?

Not strictly, but a 4x4 and local knowledge of the sandy access road make a guide worthwhile. Guided day tours from Palmas or Mateiros typically include the entrance fee and transport, which removes the uncertainty of navigating the TO-110 side roads yourself.

Can I swim with children at Cachoeira da Formiga?

Yes, the 10-minute flat walk and shallow edges suit families, but the pool reaches about 2 meters in the center. Keep young children in the sandy shallows and bring flotation aids, since there are no lifeguards on duty.

Is camping allowed at the waterfall?

Camping is available for an additional R$30 per person on top of the R$50 day-use fee, with cold showers, toilets, and electricity at sites. Confirm availability directly with the entrance staff, as space is limited and rules can change seasonally.

When is the water clearest at Cachoeira da Formiga?

The dry season from May to September delivers the best visibility, with May and June offering a good balance of clear water and thinner crowds. The rainy months from October to April can cloud the pool and make the access road significantly harder to drive.