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https://carrerasdemontana.com/2013/04/15/maliciosa-ruta-sierra-de-madrid-circuito-trail-navacerrada-maliciosa-pedriza-mataelpino-28kd1-350m/
Maliciosa: Ruta Sierra de Madrid. Circuito trail Navacerrada - Maliciosa - Pedriza - Mataelpino. (28k/D+1.350m)