America's favorite red wine passion, Merlot is known for its role, sometimes as the primary varietal, in the great wines of Bordeaux. It is, by nature, an earlier maturing grape than Cabernet Sauvignon, and tends to have rounder, plummier, more forward fruit with lower tannins so it is often used to soften and round out the edges of the more astringent Cabernet. It is the grape of choice in Pomerol and St. Emilion, and represents the basis for some of America's most popular red wines, particularly from Washington, Napa Valley, Sonoma Country, the Central Coast, Long Island, Texas, and yes, Colorado.
When it comes to New World wines, and especially wines from the United States of America, Napa Valley is something of a standard bearer. Over its relatively short history, it has managed to transform itself from being a fairly insignificant region, to becoming one of the most important and highly regarding wine locations on earth. With an ideal climate for viticulture, blazing sunshine and a low level of rainfall, this valley is shielded on many sides by mountain ranges which help it maintain a consistent level of heat, light and moisture throughout the year. Today, Napa Valley is a home of innovation and quality, with dozens of grape varietals thriving in the fertile soils. However, the main varietals grown there have always been Cabernet Sauvignon, Chardonnay, Pinot Noir, Merlot and Zinfandel, and the wines they produce are constantly lauded by critics and competitions across the globe.