Calçada do Lorena, Historic dirt road in the Parque Estadual Serra do Mar, São Bernardo do Campo, Brazil

The Calçada do Lorena is a stone-paved road built between 1790 and 1792 across the Serra do Mar, connecting the Piratininga plateau to the port of Santos. Its 50 km route, with over 700 metres of grade, used stone paving, retaining walls and rainwater channels; dissipation boxes at the curves diverted water off the road. The preserved section runs from its start on the plateau to its third meeting with the Rodovia Caminho do Mar.

The road was built in the late 1700s by order of governor Bernardo José Maria de Lorena, whose name it carries, to link São Paulo with the port of Santos. A Portuguese engineer oversaw the construction, which took roughly two years and cut travel time between the two points considerably.

The road's name honors Bernardo José Maria de Lorena, the governor who ordered it built in 1790. In 1822 Prince Regent Dom Pedro rode up the Serra do Mar by this route toward São Paulo, where he proclaimed Brazil's independence on 7 September. The Belvedere and Padrão do Lorena, erected under Washington Luís (1926–1930), commemorate the road's builder.

The trail is inside the Parque Estadual Serra do Mar and requires advance booking, either through the park office or online. The terrain can be muddy and is home to wildlife, so sturdy footwear, water, sunscreen, and insect repellent are all worth bringing.

To protect the path from floods and landslides, the builders constructed a system of stone walls and water channels that can still be spotted along the route today. These structures give a sense of how much engineering went into a road built with only basic tools.