Which of the following is the house wine categorized as red?

Canyon Road Pinot Noir is the correct choice for the house wine categorized as red. Pinot Noir is widely recognized as a popular red wine varietal known for its light to medium body and nuanced flavors, which can include notes of cherry, raspberry, and subtle earthy undertones.

In the context of the other options provided, Mont Gravet is typically a white wine, and Canyon Road Sauvignon Blanc is also a white wine, known for its crisp and refreshing profile. Chateau Ste Michelle produces a range of wines, predominantly white and red varieties, but without specifying a particular type in this instance, it does not confidently indicate a red wine choice. Therefore, among the choices given, Canyon Road Pinot Noir stands out as the only explicitly red wine, making it the appropriate answer.