Douro Valley, Portugal
The Douro Valley — carved by the Douro river through 100 million-year-old schist and granite — produces both port wine and increasingly significant unfortified table wines (Douro DOC) from the same dramatic terraced vineyards. The schist soils (xisto) are the key: they retain heat through the day (temperatures above 40°C in summer are common), channel rainwater down to the roots through their fractured structure, and produce wines of extraordinary mineral concentration. The indigenous grape varieties of the Douro — Touriga Nacional, Touriga Franca, Tinta Roriz, Tinta Barroca — were developed specifically for the combination of extreme heat, dry summers, and schist minerality. The wines produced from them (Douro DOC reds) are among Portugal's most internationally acclaimed table wines.
The Douro is divided into three sub-regions: Baixo Corgo (coolest, most rainfall, lightest wines), Cima Corgo (the heart of both port and table wine production), and Douro Superior (driest, hottest, most concentrated wines). The table wines at Reserva level (12+ months oak) show the full range of the schist terroir — dark fruit, slate minerals, graphite, dried herbs. Serve at 17-18°C with significant decanting. Pair with: duck rice, pork dishes, game, aged cheeses.
The estates (quintas) that drive quality Douro table wine production — Quinta do Crasto, Quinta do Vale Meão (the original Barca Velha estate), Chryseia (Prats & Symington), Dirk Niepoort's Redoma and Charme — represent different philosophical approaches to the same schist landscape. Niepoort's Charme (made from field-blend old vines) is possibly the most exciting Portuguese table wine. The Douro white from Niepoort (Redoma Branco) is the reference for what Portuguese white wine can achieve at altitude.
Treating Douro DOC wine as simply 'dry port' — these are distinct wines from distinct vinifications. Drinking top Douro reds too young — they need 8-15 years. Not appreciating the white Douro (from Rabigato, Viosinho, and Gouveio) which is increasingly one of Portugal's most interesting white wine styles.
My Portugal by George Mendes