Windsurfing at Cuesta del Viento offers opportunities for water sports and adventure outings at San Juan's Cuesta del Viento Reservoir, a hydroelectric dam that serves as the province's most significant source of hydroelectric power. The reservoir is located at the junction of the Blanco and Jáchal Rivers and has become one of the province's major tourist attractions in recent years, known as one of the best sites in the world for windsurfing. A 12-mile recreational area around the reservoir also offers opportunities for mountain biking and other seasonal outdoor activities. Several major wind and water sporting events are held annually at the reservoir, including the Windsurf World Championships and Kitefest Argentina.