Huascarán or Nevao Huascarán is a mountain in the province of Yungay-Cordillera Blanca, part of the Western Andes. At 6768 m, its southern peak (Huascarán Sur) is the highest in Peru and the fourth highest in South America, although a lower height of 6746 m from a more recent survey is also often quoted. The mountain was named after Huáscar, a 16th century Inca chieftain who was the heir to the Inca empire. The summit was first reached in July 1932 by a joint German–Austrian expedition. The north peak (Huascarán Norte) had previously been climbed (1908) by a US expedition that included Annie Smith Peck. The core of Nevada Huascarán, like much of the Cordillera Blanca, are Tertiary granites.