History and cultural context

The Colorado River valley around Blythe has been inhabited for thousands of years, with the Mojave and Quechan (Yuma) peoples among the most recent indigenous communities before European contact. The intaglio technique — scraping desert varnish to reveal lighter gravel — is a practice found across the American South-West and represents a distinct tradition from the raised-line geoglyphs seen elsewhere. The figures near Blythe belong to a broader category of desert geoglyphs scattered across the lower Colorado River region, though the Blythe examples are among the largest and best preserved.

The geoglyphs’ purpose is not precisely known but is understood in the context of Mojave and Quechan cosmology and ritual practice. Oral traditions recorded by anthropologists in the early twentieth century link large ground figures in the Colorado desert to creation narratives and ceremonial use — the figures may represent culture heroes or supernatural beings from creation stories. Their enormous scale (visible only from the air) has led to speculation about whether they were intended for viewing from elevated vantage points, or whether the act of creation was itself the purpose, with the figures existing for spirit beings or gods rather than for human spectators.

Pilot George Palmer became the first recorded outside observer to notice the figures in 1932, flying over the desert. His account prompted early visits by archaeologists and helped establish the site’s significance. Subsequent research confirmed multiple figures grouped in three separate complexes along the river terraces. As off-road vehicle activity in the Mojave began damaging archaeological sites in the 1960s and 70s, the Bureau of Land Management installed protective wire fencing around the Blythe geoglyphs in 1974. The site was designated a National Historic Landmark in 1964.