On the evening of 5 July 1993, we discovered a Northern Saw-whet Owl (Aegolius acadicus) at approximately 2300 meters elevation in the Sierra San Pedro Mártir, Baja California (Norte). We found the bird near kilometer marker 86while owling along the main road through Parque Nacional Sierra de San Pedro Mártir, about 2 km east of La Corona de Arriba. At this point, the main road from the west descends steeply into a canyon separating La Corona de Arriba from the higher meadows at Vallecitos to the east.