Pomerape, Stratovolcano at Chilean-Bolivian border

Pomerape is a stratovolcano on the Chile-Bolivia border, in the Oruro Department and the Arica y Parinacota Region, reaching about 6,248 metres. It is built of lava domes of rhyolitic-dacitic composition that were later covered by a cone of hornblende andesite, with lava flows on top of the domes. Glaciers descend to 5,300–5,800 metres, lower on the northern slope.

Pomerape formed through repeated eruptions over a very long period, with its last known volcanic activity dating back roughly 106,000 years. The cone shape visible today is the result of this long sequence of lava flows and ash deposits building up over time.

The Aymara people of the region refer to Pomerape and its neighbor Parinacota together as the Payachata, a name that roughly means "twin peaks." For local communities, these two summits are considered sacred places tied closely to their identity and oral traditions.

The east ridge is the usual ascent, rated alpine PD; harder lines on the south face reach snow or rubble slopes over 50 degrees. A camp can be placed at 5,300 m on the saddle between Parinacota and Pomerape. Penitentes, tall ice blades, can make the climb physically hard or impossible depending on the season.

The northern face of Pomerape carries noticeably smaller glaciers than the other sides of the mountain, while the southern face presents steeper snow slopes that require more technical descents. This difference makes the two sides of the peak very different experiences for climbers approaching from each direction.