High season is when we have the most tourists in Cusco and Machu Picchu. It runs from April to October. During these days, it is difficult to get tickets for Machu Picchu. That is why reservations must be made 1 month in advance (4 months for the Huayna Picchu Ticket). The low season runs from November to March. In these months it´s less difficult to find availability. The reservation must be made at least 1 week in advance (2 months for Huayna Picchu).