In this study a general description of Guadarrama goats breed and actions in animal breeding carried out by the Genetic Breeding and Biotechnology Department of INIA (Madrid, Spain) in collaboration with the Guadarrama Breeders Asociation since 1997, were described. Productive parameters related with milk traits were studied. Results related with trait modellization and genetic values prediction of animals of Guadarrama breed were presented.