The Blythe Intaglios or Blythe Geoglyphs are a group of gigantic figures incised on the ground near Blythe, California, in the Colorado Desert. The ground drawings or geoglyphs were created by humans for an, as yet, unknown reason.
The intaglios are located east of the Big Maria Mountains, about north of downtown Blythe, just west of U.S. Highway 95 near the Colorado River. The Blythe Intaglios are the most well-known of the over 200 intaglios in the Colorado Desert. The Colorado Desert contains the only known desert intaglios in North America. These intaglios are mostly located along the Colorado River.
The Blythe Intaglios contain three human figures, two four-legged animals, and a spiral; although Harner (1953) reported two spirals. The largest human figure in the Blythe Intaglio group is long. The intaglios are best viewed from the air.
Geoglyphs are found throughout the world, the construction methods ranging from earthen mounds, piles of stone, or the removal of surface plants or soil. The most famous desert intaglios are the Nazca Lines in Peru. The Blythe Geoglyphs or intaglios (anthropomorphic geoglyphs) were created by scraping away layers of darker rocks or pebbles to reveal a stratum of lighter-valued soil. The displaced rocks outlined the figures and the exposed soil was stamped down which makes it more difficult for plants to grow in the lines. The intaglios are located on flat terraces in the Colorado River floodplain.
While these "gravel pictographs" are found through the deserts of southeastern California, human figures are found only near the Colorado River. Other intaglios depict mountain lions, birds, snakes and unidentified zoomorphic and geometric shapes. The figures are so immense that many of them were not observed by non-natives until the 1930s. The set of Blythe Intaglios and nearby geoglyphs include several dozen figures, thought to be ceremonial in nature.
No Colorado River Native American group has claimed to have made the intaglios, although some have claimed to use them. Many of the intaglios are believed to date from the prehistoric period, but their age and the identity of their creators are still uncertain. If the quadruped figures represent horses (reintroduced in North America by the Spanish) then a historical date would be supported. Jay von Werlhof and his collaborators obtained 13 AMS radiocarbon dates for the figures, ranging from 900 BCE to 1200 CE.
Rediscovery
In 1932, George Palmer, a pilot flying between Las Vegas, Nevada and Blythe, California noticed the Blythe geoglyphs. His find led to a survey of the area in the same year by Arthur Woodward, Curator of History and Anthropology at the Natural History Museum of Los Angeles County. Malcolm J. Rogers subsequently studied and sketched the Blythe Intaglios in 1939. After National Geographic published an article about the Blythe Intaglios in 1952, people began to visit the site which led to some destruction of the intaglios.
The interest in the Blythe intaglios led to the search for and discovery of more desert intaglios. The Bureau of Land Management erected fences in 1974 to protect the intaglios and the Blythe Intaglios were placed on the National Register of Historic Places in 1982.
Similar intaglios, named the Ripley Group, were found nearby in Arizona across the Colorado River from Ripley, California.
Topock Maze
The Topock Maze or Mojave Maze, another geoglyph site near Needles, California, covers and consists of a series of parallel windrows approximately apart. However, it is unclear whether the Topock Maze was created by Native Americans.
Edward Curtis reported in 1908 that, "The Mohave Indians near by have utilized the area ... in recent years, as a maze into which to lure and escape evil spirits, for it is believed that by running in and out through one of these immense labyrinths, one haunted with a dread may bewilder the spirit occasioning it, and thus elude them." Similarly, an unpublished mid-20th century report cited second-hand ethnographic information that, prior to 1900, the "Mohave used to put some of their men in the center of the area of alignment and left them to find their way out of the maze without crossing the gravel alignments. By doing this they would leave the devil behind them."