This youthful and adventurous agency runs tours of Parque Estadual do Jalapão, Taquarussu and around, from one to seven days (R$150 to R$3000 per person). Tours include visiting remote waterfalls and Jalapão's famous sand dunes. Travel is by 4WD vans; lodging includes camping and modest hotels. Guides are excellent; the clientele is mostly Brazilian. The extreme heat and strenuous excursions may prove challenging for some.
A sister agency, Jalapão Eco Tour, which also has an office in Palmas, may handle some logistics. Contact them in advance of your visit.