Colin Monteath / Sunset on Yerupaja and Sarapo mountains from Sarapococha Lake, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Ninashanca, Rondoy, and Jirishanca peaks with afternoon build-up of clouds, Cerro Yaucha, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Yerupaja Chico, 6121 meters, from Cerro Yaucha, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Chemicals leaking from old gold mine cause orange colored mud in swamp, Cashapampa Valley, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Yerupaja summit ridge, 6617 meters, at sunset, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Cacti near Cerro Cuyoc, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Alpaca (Lama pacos) group above Laguna Viconga, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Distichia (Distichia muscoides) cushion plant in dried out swamp area under Carnicero peak, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Sun sets behind Jirishanca peak with Yerupaja peak and river flowing into Carhuacocha Lake, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Domestic Horse (Equus caballus) herd grazing under Siula Grande near Carhuacocha Lake, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Siula Grande, Yerupaja, Yerupaja Chico and Jirishanca peaks emerge from morning cloud with reflections in Carhuacocha Lake, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Jirishanca, 6090 meters, view from Carhuacocha Lake, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Jirishanca peak, 6090 meters, dawn reflection in stream running into Mitococha Lake, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Jirishanca peak, 6090 meters, dawn reflection in stream running into Mitococha Lake, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Jirishanca peak, 6090 meters, reflection in stream running into Mitococha Lake, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Trekker and limestone ridges with peaks from 4700 meter Cacananpunta Pass, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Rondoy peak, 5870 meters, at sunset, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Chemicals leaking from old gold mine cause orange colored mud in swamp, Cashapampa Valley, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Trekkers descend steep scree slopes from Santa Rosa Pass with Jurau Lake and peaks of Yerupaja and Siula Grande in clouds, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Cordillera Raura peaks and high alpine lakes, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Cactus flowering near Cerro Cuyoc, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Retreating hanging glaciers from summit Cerro Cuyoc, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Distichia (Distichia muscoides) cushion plant and Plantain (Plantago rigida) on edge of swampy high country, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Glacial moraine lakes and Yerupaja and Siula Grande peaks, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Trekker beneath Yerupaja, Yerupaja Chico and Jirishanca from above Carhuacocha Lake, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Trekkers camp near Carhuacocha Lake under Yerupaja peak, Cordillera Huayhuash, Andes, Peru

Colin Monteath / Siula Grande, Yerupaja, Yerupaja Chico and Jirishanca peaks emerge from morning cloud with reflections in Carhuacocha Lake, Cordillera Huayhuash, Andes, Peru