Montaña de Siete Colores or the Rainbow Mountain. This hike definitely kicked my butt a little. The path isn't too steep for most of the hike, but the summit is at 5,200 meters or just over 17,000 feet above sea level. The air is very thin here and altitude sickness is common. The brilliant colors of this mountain were only recently revealed when the glacier ice covering it melted away in 2013 and tours of the area began around 2016.