Some people say that where the Alps stop the Andes start. The medium altitude in the Andes is 4,500 m, sometimes even more. The infrastructure in Chile's highlands is well developed. Using a 4x4 vehicle can get you fairly close to the high area of the mountain and quite high, so that the time needed to climb peaks is much shorter. This makes the supply with water for base camps possible without having to use expensive transports. The best months for mountain climbing are from May to September. During this time the wheather is most stable. Since some of the mountains are located in the border area, official climbing permits from the Chilean authorities might be required.