On San Juan ’s southern outskirts, the locality of Pocito is home to a cluster of wineries that are worth sampling, even if they can’t match Mendoza ’s size and diversity. All are on or near RN 40, the paved highway from Mendoza.
Closest to town is Champañera Miguel Más (Calle 11 s/n, tel. 0264/422-5807, miguelmas [at] infovia [dot] com [dot] ar), 300 meters east of RN 40. A family-run bodega with only 2.5 hectares of organic grapes, it produces fewer than 10,000 bottles of sparkling wine per annum. It also makes some cabernet sauvignon and malbec, a small amount of muscatel, and quantities of jam and honey. At this mom-and-pop operation, tours and tasting are about as personal as can be; hours are 9 a.m.–6 p.m. weekdays, 9 a.m.–1 p.m. Saturday.
About two kilometers farther south, fronting the west side of the highway, Fabril Alto Verde (RN 40 between Calle 13 and Calle 14, tel. 0264/421-2683, www.fabril  altoverde.com.ar) is an organic winery with a more high-tech and diverse production that includes varietals like Chablis, chardonnay, malbec, and Syrah, plus some sparkling wines. The winery and its contemporary tasting room are open for tours (make advance arrangements for English) 9 a.m.–1 p.m. and 3:30–7:30 p.m. Monday–Friday, 9 a.m.–1 p.m. Saturday.
In sheer tourist appeal, the best choice is Viñas de Segisa (Aberastain y Calle 15, tel. 0264/492-2000, www.saxsegisa.com.ar , 10 a.m.–7 p.m. Mon.–Sat., 10 a.m.–2 p.m. Sun.), a boutique winery that has conserved its century-old facilities and adapted them to individualized guided tours—which include tastings directly from their cellar casks. It is nevertheless a contemporary bodega producing cabernet sauvignon, Syrah, malbec, chardonnay, and a torrontés-chardonnay blend, plus a premium line that includes tempranillo.