Manchao Ultra Trail is an unprecedented event in Argentina that challenges the adventurous spirit of the mountain runners, oriented to lovers of Trail Running and / or Skyrunning. It is developed in the circuit AN-HUATU, denomination Quechua to the cord of the Ambato. The Quechua called it "Place of Fear" because of its climatic variations. It is considered the Cerro school of Argentina. The mountain corridors have conquered the top of Cerro Manchao running for the first time in its history. Since previously they only acceded in mode of trekking or cavalcade. Runners enjoy isolated virgin paths of civilization, unique landscapes, native fauna and flora. So it requires a good level of training and ability to adapt to conditions that can become extreme. The tours have real demands for a high mountain race. Manchao Ultra Trail is the most difficult mountain race in Argentina. Mostly the same transit above the 2000 MSNM, with its maximum peak at 4600 MSNM. With a positive accumulation of 8000 mts in its longest distance, which consolidates it as the most difficult race in Argentina and one of the most extreme in the world.