The following day should start early, it is advisable to leave after 6:00 am, since this will be a very long and tiring day of walking between 8 and 11 hours (approx. 28 km), which requires greater physical effort, taking into account that you can begin to feel the symptoms of altitude. Starting from Confluencia along the marked and signposted path, 10 minutes away you will find the division of the Climb Aconcagua roads that lead to Plaza Francia and Mulas, the course of both is signposted so there is no confusion about which one to take. The road goes down to a small plain called Inferior Confluence (old camping place) where the Horcones is crossed by a small bridge to go back up the slope bordering the river. This slope you enter the so-called Playa Ancha, a wide and picturesque flat ravine that is not difficult but makes you feel its slope at the end of its journey, you can follow several paths that go along the right bank of the Horcones Superior River. Approximately three hours away is Climbing Aconcagua Piedra Ibañez (3790 masl), a large rock that serves as a stop where you can take your first break, eat something and hydrate. An hour after the last break, continuing along the trail, Playa Ancha ends, Cerro Dedos marks its end and the changes its appearance, the narrows and the trail begins to climb steep slopes that make themselves felt, as a backdrop observe the Cuerno hill and the Horcones glacier, at whose base Aconcagua with your hands, since the west face of the massif accompanies the journey. Continuing about 3 hours and a half approx. you arrive at an old military refuge (4050 masl) destroyed by an avalanche, the last place to regain strength and face the end of the route, the so-called Cuesta Brava, which lives up to its name, Aconcagua Climb taking into account the hours traveled and the height gained. After the slope, where you have a panoramic view of the glacier and the Aconcagua base camp.Going up the moraine, you reach Plaza de Mulas (4,350 masl), a small city of tents in the Cordillera, base of the normal route of the Colossus, fully equipped with accommodation.