Quinta do Mourão sits in the Duriense region of Northern Portugal, where steep terraced vineyards and schist soils have long shaped the character of fortified wines. The winery draws on traditional Port varieties—Tinta Roriz, Tinta Barroca, Touriga Franca, Tinta Cão, and Touriga Nacional—grapes prized for their depth and structure in the region's warm continental climate. The S. Leonardo Vintage Port, a blend of five varieties, has earned recognition from Wine Enthusiast and Wine Advocate. The S. Leonardo 60 Anos Porto, a more concentrated expression built on Tinta Barroca, Touriga Nacional, Touriga Franca, and Tinta Roriz, demonstrates the winery's command of aging and oxidative development. Both wines reflect the Duriense's reputation for producing Ports of complexity and longevity.