This is the classic 4 day/3 night (60km) "alternative" Salkantay Inca Trail. The route starts in Soraypampa, passes over a high point at Abra Salkantay (4600m) before descending to Huayracmachay and then into the upper cloud forest at Collpapampa. The trail then meets a dirt road which descends the valley past La Playa (2200m) until reaching Lucmabamba where it continues on original Inca Trail up over a second high pass to Llaqtapata (2700m) and then descends a steep series of switch-backs to a dirt road leading to Hidro Electrica where the trail follows the train tracks which lead to Machu Picchu Pueblo (Aguas Calientes).
Note this is different from the "Classic" Inca Trail, which runs about 30km from Km 82 (from Cuzco on the train) to Machu Picchu, and is much more tightly regulated. It is only possibly to "run" the "Classic Inca Trail" during an annual race on the route.