A reader writes in response to the blog post "Big Bear is Now the Highest-Altitude Vineyard in the Northern Hemisphere"
Actually there is a vineyard that is at higher altitude in the northern hemisphere. It's called El Tunal, at 2100 meters above sea level. It's a 20ha vineyard, with vines ranging from 10 to 5 years old, producing Cab Sav, Merlot, Syrah, Chardonnay, Pinot Noir and Sauvignon Blanc. The wines are called Don Leo (not myself, that's just a coincidence), http://vinosdonleo.com/
The vineyard is located about 20km from a town called Parras de la Fuente in Coahuila Mexico. This town is home to another winery (the oldest in the whole American continent) Casa Madero (madero.com.mx), operating since 1597.