It is very likely that the Inca Trail to Machu Picchu was completed in three nights and two days by the ancient Incas, considering the limitations of their time, there are records that the route had resting places, Tambos, specialized for travelers who carried supplies or possibly they traveled to Machu Picchu on a pilgrimage. Today you can do it in a single day, but not the complete route, nor is the two-day trek the complete route, it is about accessing the trek from an easy and quick detour for people who want to enjoy the Inca Trail without the need to spend three nights in tents. We recommend you take the trouble and walk the four days, because the landscape and the journey will be unforgettable.
Another important detail is to make your reservation up to six months in advance, the great demand means that tickets and services sell out quickly. Be very careful with the agencies that offer you the trek at the last minute, it is possible that they will sell you another route, although it is also a beautiful trek, the Salkantay tour to Machu Picchu is not equal to the traditional Inca Trail.