Pioneer Seamount is located at 37° 21.1' North Latitude, 123° 26.1' West Longitude, NOAA Vents Program Acoustic Monitoring; Acousting Monitoring Program Pioneer Seamount at the base of the continental slope United States Geological Survey Monthly Newsletter Sound Waves: Fieldwork: Geologists and Biologists Endeavor to Understand Seamount Environments Off California of North America about 95 kilometers off the coast just southwest of San Francisco, California.