The Sierra de San Luis is a mountain range located in the province of San Luis, Argentina. It is part of the larger Sierras Pampeanas system and features a variety of landscapes, including rugged peaks, valleys, and forests. The area is known for its rich biodiversity and offers opportunities for outdoor activities such as hiking and rock climbing. The range is home to several notable peaks, with Cerro Mercedario being one of the highest. The Sierra de San Luis also has significant cultural and historical importance, as it has been inhabited by various indigenous groups and later explored by European settlers.