Possible vocalizations heard outside Inyokern witnessed in Kern County, California

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I lived in the High Desert of California in Ridgecrest, CA in Kern County from 1980 to 1985. I did a lot of hiking in the Sierra Nevada Mountains. I never saw or heard anything unusual during that time. MY Mom, Sister (& Family), and Brother and his Family still live there. My 19 year old son and I were visiting various family members from Sept 17 through Sept 27 2007 in Ridgecrest, CA. My sister took me and my son up to the Siebert family gold mine, cabin, and mining equipment on the 24th of September. We had spent about an hour at this location and we were preparing to leave. My sister was in the Port-a-Potty and my son and I heard this high pitch scream like a woman hollering, and it sounded just like the ones we heard on your sight. Just like the sound that was reported in the BFRO Report # 9426 (Class B), which is only 7 miles from that site. We yelled back thinking it was a woman in trouble and there was no reply. I asked my sister if she heard it she said no. I told ...