Adventure Travel, Inca Trail Trek, Machu Picchu Travel, Peru Travel, Trekking in Peru What are the most popular treks in Peru? Posted on August 19, 2013May 6, 2015 by Layna George By far, the most popular trek in Peru is trekking the classic Inca Trail. After that, many travelers trek along an Apu Salkantay route and/or in various parts of the Sacred Valley, both of which can bring you very close to Machu Picchu. Check out Peru treks here Layna George What is altitude sickness? What Makes Detour Special?