The Rainbow Mountain of Peru, also known as Vinicunca, are stunning and can be seen on the spectacular Ausangate Trek. Ausangate mountain itself is considered a holy mountain (or mountain spirit) by local Peruvians and is the deity of Cusco. Since pre-Inca times the mountain has been a place of worship and offerings and this tradition continues today. Most trips that allow you to see the Rainbow Mountains require a trek of at least 6 days. That has changed with this brand new itinerary. We have designed this hike so that it can be done as a day trip! On this trek you will see quaint villages, beautiful adobe style houses, herds of llamas and alpacas and you will have magnificent views of the Ausangate Glacier (6,385 m / 20,945 ft), the highest mountain in the Cusco region. 

http://www.rainbowmountainperu.net/rainbow-mountain-peru-full-day.html