With age range of 5030-4840 years ago (as of 2009) for one of the earth ovens, this site — Rowher Flat No. 2 in upper Mint Canyon / Agua Dulce — is one of the oldest sites in the Santa Clarita Valley. Although the authors associate it with
the Tataviam culture, the Tataviam didn't arrive from the Great Basin until ~A.D. 450, well after the latest date these earth ovens were used. They were used by ancestral peoples whose ethnic identity is unknown.
Site CA-LAN-857, also known as the Rowher Flat No. 2, is located in the foothills of the
Castaic Mountains five miles northwest of Vasquez Rocks County Park, Los Angles County,
southern California. [...] The site encompasses twenty-six acres, and it is believed to have been associated with the
Native Californian Tataviam cultural group. Cupule pit rock art boulders, lithic flakes and cores,
gravers, projectile points, groundstone, and rock alignments and clusters have been found at
the site, as well as human skeletal remains associated with shell tube beads that date the site's
occupation back to approximately 6000 to 2400 BC. Charcoal recovered from two of the heated
rock clusters thought to represent stone-lined earth ovens were submitted for identification.