Simi Hills

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The Simi Hills are a rocky mountain range on the western edge of the San Fernando Valley, United States. They run east-west and they extend 26 miles east-west, and 7 miles north-south. The Simi Hills are part of the Ventura Ranges, which themselves are part of the Transverse Ranges. They are almost entirely in Ventura County (the foothills in the south and east are part of Los Angeles County). Simi Valley lies to the north, and Chatsworth, Los Angeles, California lies to the east, over the border in Los Angeles city and county. The Simi Hills are the home of the Rocketdyne Santa Susana Field Laboratory where the first commercial nuclear reactor was operated, and the Ronald Reagan Presidential Library.

Peaks at this region include Simi Peak and Chatsworth Peak.