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The periglacial record in the Sierr a del Barc o (sistema central,spain) and its relationship with the pleistocene glacial system. The geomorphological study carried out in the Sierra del Barco allow us to reconstruct a large number of periglacial features and deposits and relate them to the dominant causal geomorphic processes, thus obtaining an inventory of system specific features. Possible present-day and past permafrost, nivation and freeze-thaw processes during the stages of periglacial activity are analysed. The chronological sequence of these features relative to the Last Glacial stages is also presented. The effect of glacial processes during the “montera”, maximum, valley, slope and cirque phases is pointed out, along with the sequence corresponding to the pre-Last Glacial and present.