A visit to Tom Puyaubert’s winery on the outskirts of Laguardia in the Basque corner of Rioja can be a culture shock after visiting some of the grander cellars in Rioja Alta. Home to one of Rioja’s most stimulating portfolios, Puyaubert’s tiny winemaking unit is bursting at the seams with fermentation vessels and various other winemaking accoutrements—so much so that getting around almost requires embracing a concrete egg or wooden fermenter to keep your balance. Despite taking on the opposite unit to make life more comfortable, Exopto’s artisanal roots remain alive and well. Having arrived on a shoestring in 2003, Puyaubert now farms 30 plots spread across 22 hectares of vines—the majority of which are over 60 years old—in the western Sonsierra, the small pocket of Rioja Alta between the River Ebro and the Basque mountains. This postcode has much in common with Rioja Alavesa and is sometimes called Rioja’s Côte-d’Or. The key villages are Ábalos, San Vicente and Baños de Ebro, where the brilliant rocky, chalk-rich soils, cooler climate and high altitudes form the foundation for the terroir-focused, finely etched style of Puyaubert’s wines. Exopto’s entry-level wine is a masterstroke. Even at this price, yields are a fraction of the regional norm, and the average age of the wines is 50 years old. The wine, now simply labelled Exopto, fuses the primary earth-to-glass elements of the region’s traditional cosechero Riojas with the glistening fruit and delicious balance of Rioja’s newer, quality-driven traditions. It’s also a wine that has brought Puyaubert a well-deserved level of success, allowing him to invest and focus his energy on his domaine’s most singular ‘grand cru’ vineyards: La Mimbrera in Ábalos and El Bernate (pictured below), El Bortal and El Espinal in San Vicente. A quick shout-out for the domaine’s new-release white wines. You don’t need to spend much time with diligent growers in this cool, rocky part of Rioja to know that the potential for the region’s whites is seemingly limitless. On the one hand, the chalky soils, fresh climate and old vines can provide wonderful raw materials. And the other, you’ve got growers and producers like Tom Puyaubert, Luis Valentín at Valenciso, and many others, honing their winemaking year after year. In doing so, they are taking white Rioja to another level. One insider we spoke to called the whites Rioja’s sleeping beauty: “Not long from now, Rioja will be making many of the best whites in Spain. If not already.”