Greaser Petroglyph Site, Archaeological site with ancient rock carvings in Lake County, Oregon.

The Greaser Petroglyph Site is an archaeological location in Lake County featuring ancient rock carvings created by Indigenous peoples. A basalt boulder displays etched images of animals, human figures, and geometric patterns that have remained visible across thousands of years.

The carvings were created thousands of years ago, showing a long history of human occupation in this region. The site was added to the National Register of Historic Places in 1974, officially recognizing its importance to archaeology and regional history.

The Northern Paiute bands were living near Greaser Canyon by 1840, but the carvings may predate them by thousands of years, so their origin is uncertain. Their meaning is unknown; they may have marked territory, given directions, served ceremonies, or told a personal story. A sign at the boulder warns that altering the designs violates federal law.

The petroglyphs are on a southwest-facing basalt boulder about half a mile north of Oregon Route 140, 5 miles east of Adel and 28 miles east of Lakeview. The 9-acre protected area is open rangeland managed by the Bureau of Land Management. A sign at the site warns that altering the designs violates federal law.

The carvings were scraped into a single southwest-facing basalt boulder about half a mile north of Oregon Route 140. The site was vandalized at least once, and Bureau of Land Management archaeologists repaired the damage; a sign now warns that altering the designs violates federal law.