What is the primary grape variety used in Cote Rotie wines?

Côte Rôtie wines are predominantly made from the Syrah grape variety, which is known for producing robust, full-bodied red wines that are rich in flavor and complexity. This grape variety thrives in the steep, sun-soaked slopes of the northern Rhône Valley, where Côte Rôtie is located. The region is particularly noted for its unique terroir, including schist and granite soils, which contribute to the distinctive character of the wine.

In Côte Rôtie, Syrah is often blended with a small percentage of Viognier, a white grape variety, to enhance aromatics and flavor, but the primary variety remains Syrah. This local practice exemplifies how winemakers in the region utilize blending to create a harmonious and complex final product that showcases the richness of the Syrah grape.

Other grape varieties mentioned, such as Chardonnay and Riesling, are not typically associated with this appellation, as they are more commonly found in other regions. Merlot, while popular in many wine-producing areas, is also not a significant contributor to Côte Rôtie wines. Thus, Syrah is the correct answer due to its dominance in the production of these wines and its integral role in defining the style and character of Côte Rôtie.