The high of the path is about 3,650 meters above sea level (12,000 feet). It was difficult but I was fine. Coca leaves helped me a lot! :) Thank you:) I´m not sure if we can call it "alternative" of Inca Trail because it doesn´t finish with Machu Picchu but.. Price is less than Inca Trail (60 soles = 18 dollars), Inka trail is 600 dollars (good price) - 1000 dollars... it depends on the company (train is the same price) .. But if you have plans to go there I highly recommend Colca Canynon :)