The Rise of Rocky Mountain Riesling David Mark Brown March 30, 2010 FCG, Wine Spotlight 12 Comments Most Riesling connoisseurs have long considered Germany, specifically the Mosel Valley, as the varietal’s rightful throne. This is probably still true. The Mosel Valley’s unique, steep slopes of sun-absorbing slate have allowed the cool climate of Central-Western Germany to create ideal Riesling wines for over 150 years. But, as Riesling slowly grows in popularity, vintners around the world, the United States included, are giving it a go in new regions and climates. It is no wonder. While the retail sales of Pinot Gris outgrew all other white wines from 2004 until 2007, Riesling has taken that title for the last few years.