Pico do Marumbi State Park, State park in Morretes, Paraná, Brazil.

Pico do Marumbi State Park is a protected mountain area within the Serra do Mar range covered by thick Atlantic Forest with eight different peaks. The landscape displays steep slopes, natural streams, and lush vegetation shaped by humid climate conditions.

Joaquim Olímpio de Miranda, with Bento Manoel de Leão, Antônio Silva and Antônio Messias, first reached the highest summit on 21 August 1879, starting Brazilian mountaineering; the peak was named Olimpo after the Greek home of the gods. The state park was created by decree 7300 of 24 September 1990 with 2,342.41 hectares and expanded to 8,745 hectares by decree 1,531 of 2 October 2007.

Tupinologist Eduardo Navarro gives two possible origins for "Marumbi": from the general language maromby, "river of big fish" (maromba, big fish, plus 'y, river), or from Portuguese marumbi, "lagoon full of taboas." The name Olimpo was chosen by Antonio Ribeiro de Macedo in honour of first climber Joaquim Olímpio de Miranda and of the Greek mountain of the gods. Since 1879, 21 August has been celebrated as Brazil's National Mountaineering Day.

The location is best reached by train from Curitiba, offering a scenic journey through mountain terrain. Visitors should bring sturdy footwear, weather-resistant clothing, and plenty of water, as trails are demanding and often wet.

The Marumbinistas Waterfall is a 50-metre fall on the Taquaral River, with several natural pools where visitors bathe. It is reached from the park base, the same starting point for the 30-minute walk to the Rochedinho, a 630-metre viewpoint over the Paranaguá and Antonina bays.