To do the trekking and ascent to Aconcagua it is mandatory to register online, request the permit and pay the entrance fee at: www.aconcagua.mendoza.gov.ar– For the walk to Laguna los Horcones, online registration is not necessary. Payment is made at the provincial park visitor center.– For the Horcones – Confluencia one-day trek, online registration is not necessary. Payment and permission are made at the Horcones Visitor Center.aconcagua activitiesActivities in Aconcagua Climb AconcaguaTo take into account: For the trails it is mandatory to bring your ID or passport, sports shoes, a coat, sun protection, food and drinking water.Note: There is no food for sale in the park.What to do and activitiesIn the Aconcagua Park you can take walks along trails, trek through the mountains and climb to reach the summit.easy hikeValle de los Horcones interpretive trailThis one-hour circuit is the easiest to complete. Along a well-signposted interpretive trail, you can visit the Laguna Espejo, geological formations, fossil remains, the viewpoint of Aconcagua and Laguna Horcones. trekking trailsTrekking trails are divided into three types:1 – One day trek2- Short trek of 3 days3 – Long trek of 6 daysValley of Horcones Climbing AconcaguaDay circuit:Horcones – Confluence (3-4 hours)- Horconesshort circuit:1st day: Horcones- Confluence (3-4 hours)2nd day: Confluence- Plaza Francia (5 hours)- Confluence3rd day: Confluence- HorconesLong Circuit:1st day: Horcones- Confluence (3-4 hours)2nd day: Confluence- Plaza Francia (5 hours)- Confluence3rd day: Confluence Aconcagua Expedition4th day: Confluence- Plaza de Mulas (10 am)5th and 6th day: Plaza de Mulas7th day: Plaza de Mulas- Horcones (8 hours)cow valleyDay circuit:Cows- Pampa de Leñas (5hs)- Cowsshort circuit:1st day: Punta de Vacas- Pampa de Leñas (5 hours)2nd day: Pampa de Leñas- Casa de Piedra (6 hours)3rd day: House of Stones- Punta de Vacas (8 hours)Long Circuit:1st day: Punta de Vacas- Pampa de Leñas (5 hours)2nd day: Pampa de Leñas- Stone House (5 hours)3rd day: House of Stones- Plaza Argentina (5 hours)4th day: Argentine Square5th day: Plaza Argentina- Stone House (4 hours)6th day: Stone House- Pampa de Leñas (4 hours)7th day: Pampa de Leñas- Punta de Vacas (4 hours)Aconcagua Park pricesTo carry out the treks, you must pay an income and permit, the price of which depends on whether the trek is for a day, short or long. Rates also differ for residents of Argentina, Latin America or the rest of the world.