The Serra dos Órgãos is a mountain range in the state of Rio de Janeiro, Brazil. The region is home to the famous Serra dos Órgãos National Park and the Três Picos State Park. The range is covered by extensive areas of Atlantic Forest and gives rise to numerous streams. It is also the mountain chain where the historic city of Petrópolis is nestled.

The Serra dos Órgãos is part of the Serra do Mar mountain system, spanning over 20,000 hectares. Its name comes from the resemblance between the vertical rock formations and the organ pipes found in old churches. Along the escarpment, the elevation rises over 2,000 meters above sea level.

The mountains known as Dedo de Deus (God’s Finger) and Escalavrado are iconic. Along with nearby peaks, they form dramatic rocky walls that can be seen from the city of Rio de Janeiro on clear days. A northwest fracture is visible on the rocky surfaces of the plateau, defining the direction of grooves and valleys along the escarpment. Vertical northeast-oriented fractures, regularly spaced about every 500 meters, cut these structures at right angles. Erosion along these fractures has isolated massive rock blocks.

The Serra dos Órgãos National Park is a protected conservation area located within the range, encompassing the municipalities of Guapimirim, Magé, Petrópolis, and Teresópolis, with an area of 20,030 hectares. It is open year-round for visitors and managed by ICMBio, an agency under Brazil’s Ministry of the Environment. Although the park is open all year, the mountaineering season runs from May to September, attracting adventurers from all over seeking direct contact with nature. The main route is the Petrópolis–Teresópolis Crossing, a three-day hike considered the most beautiful trek in Brazil.