Leave the train from Cuzco to Aguas Calientes at the Km88 stop. Here you will purchase your trekking permit for Peruvian soles, available only at the visitor center. Cross this suspension bridge over the Urubamba to begin your journey. The trail is initially easy climbing toward the little settlement of Huayllabamba where you can buy refreshments. The trail next becomes steep, becoming more so as you climb higher.
You'll see ruins of Llactapata on your way to the meadow under the First Pass where you'll camp at Llulluchapampa high above the tree line. You'll have excellent views back down the valley. In fact, at some of the better-known spots along the trail, you might have to wait your turn at the more scenic vantage points.