Guartelá Canyon, Natural canyon in Paraná, Brazil.

Guartelá Canyon is a straight-walled gorge about 30 km long between Castro and Tibagi, cut by the Iapó River through the Devonian Escarpment. Its walls reach a maximum drop of 450 m, with slopes over 60° and layered sandstone benches. The river forms rapids and natural pools (panelões) along the rocky floor.

The protected area was established in 1992 to preserve the landscape and archaeological sites. Rock paintings found in the gorge date back thousands of years and were created by early inhabitants.

The sources do not record the origin of the name Guartelá, so visitors should not repeat the Kaingang etymology. What can be seen today are rock inscriptions inside the gorge, reached by trails through the park, alongside waterfalls, rapids and sandstone formations. Rafting on the Iapó and Tibaji rivers and rappelling at waterfalls are practised in the surrounding area.

The park is accessible through marked trails that wind through the protected area. Visitors should prepare for varying terrain and trail conditions depending on which routes they choose to explore.

The canyon cuts through sandstones of the Furnas Formation, laid down 400 to 360 million years ago, and was classified by SIGEP as one of Brazil's geological sites. In the Iapó riverbed, rhyolites and andesites of the Ordovician Castro Group, the basin's basement here, can be seen.