What is the main grape variety used in Rioja wines?

Tempranillo is the primary grape variety used in Rioja wines, which are renowned for their unique character and aging potential. This grape is indigenous to Spain and is known for producing wines that exhibit a range of flavors, including red fruit, leather, and vanilla notes, particularly when aged in oak barrels.

In the context of Rioja, Tempranillo is often blended with other grapes, such as Garnacha (Grenache) and Mazuelo (Carignan), but it is the dominant varietal that defines the region's signature style. The grape's adaptability to the region's climate, along with its ability to age beautifully, makes it the cornerstone of Rioja’s winemaking tradition.

Other grape varieties mentioned in the choices, while important in various regions or blends, do not hold the same prominence in Rioja as Tempranillo does. For example, Sangiovese is primarily associated with Italian wines, Cabernet Sauvignon is more characteristic of Bordeaux and New World wines, and Grenache is typically used in regions like the Rhône Valley and in blends, but does not dominate the Rioja landscape.