Around 11,000 years ago, someone living near a volcanic butte in what is now central Oregon sat down and twisted strips of sagebrush bark into a pair of sandals. That act — mundane, practical, repeated endlessly across generations — turns out to be one of the oldest documented examples of footwear ever found anywhere on Earth.
What the evidence shows
- Fort Rock sandals: Dozens of twined sagebrush bark sandals were excavated from Fort Rock Cave in Oregon’s Great Basin in 1938, buried beneath volcanic ash from the eruption of Mt. Mazama roughly 7,500 years ago.
- Radiocarbon dating: Direct dating of sagebrush bark from multiple specimens places the oldest sandals at approximately 10,390–9,650 calibrated years before present — roughly 8,400–7,700 B.C.E. — making them among the earliest dated footwear on record.
- Twining technique: Each sandal was constructed using a sophisticated twining method, with weft fibers twisted around rope warps from heel to toe, then subdivided into finer warps to create a flexible toe flap — evidence of skilled, deliberate craft.
A desert people with extraordinary skill
The Fort Rock Basin sits at the northwestern edge of the Great Basin, a vast high-desert region covering much of the interior American West. Around 9,000 B.C.E., it was a different landscape — wetter, cooler, dotted with pluvial lakes fed by glacial meltwater. The people who lived here were skilled foragers moving across a resource-rich environment that rewarded ingenuity.
Archaeologist Luther Cressman of the University of Oregon made the original discovery in 1938. Digging through the floor of Fort Rock Cave, he found dozens of sandals beneath a distinct ash layer — a natural timestamp left by the catastrophic eruption of Mt. Mazama, the volcano whose collapsed caldera became Crater Lake. The sandals had been deposited before that ash fell, which placed them firmly in a much earlier world.
Subsequent radiocarbon dating confirmed what Cressman suspected. The sandals were ancient. The two earliest measurements, run on sagebrush bark directly from Fort Rock Cave, produced a weighted average calibrated age range of approximately 10,390–9,650 years before present. Later direct dating of specimens from Catlow Cave and Cougar Mountain Cave produced overlapping results, establishing Fort Rock-style sandals as a consistent regional tradition spanning centuries.
How the sandals were made
These were not simple coverings. Fort Rock-style sandals are technically sophisticated objects. Makers began at the heel and worked toward the toe, twining pairs of weft fibers tightly around five rope warps. At the toe, the warps were subdivided into finer elements and turned back toward the heel, then open-twined with spaces between weft rows to form a flexible toe flap.
A tie rope attached to one edge of the sole and wrapped around the ankle to fasten on the opposite side — a functional, adjustable fit. The finished sandals were flat-soled, durable, and shaped to the human foot. The sagebrush bark used as raw material is fibrous and strong, well-suited to dry, rocky terrain.
This level of craft implies transmission — knowledge passed deliberately from one person to another, probably over many generations before the specimens we have were made. The sandals we can date are almost certainly not the first ones ever made by these or related peoples.
Lasting impact
Footwear is not a small thing in human history. Protecting the feet from rough ground, cold, heat, and injury expands the range a person can travel, the loads they can carry, and the environments they can inhabit. Some researchers have linked the adoption of footwear to changes in foot bone structure visible in skeletal remains — a physiological record of a behavioral shift.
The Fort Rock sandals also speak to something broader: the emergence of complex fiber technology in the ancient Americas. Twining is the same fundamental technique used in basketry and textile production. The same hands that made sandals almost certainly made baskets, nets, cordage, and carrying bags — a whole toolkit woven from plant materials that rarely survives in the archaeological record. The sandals survived partly because of the dry conditions of the Great Basin and the protective seal of volcanic ash.
Their discovery helped establish the Northern Great Basin as a region of deep human occupation and sophisticated material culture long before it was widely recognized as such. Cressman spent decades arguing, against skeptical colleagues, that the Americas had been peopled far earlier than conventional wisdom suggested. The sandals were among his strongest evidence.
Fort Rock-style sandals have since been identified at several other Great Basin cave sites, suggesting a shared tradition across a wide geographic area — communities connected by common knowledge, common materials, and common needs, even across distances of hundreds of miles.
Blindspots and limits
The radiocarbon dates for the oldest Fort Rock sandals carry significant uncertainty — the two earliest measurements have standard deviations of several hundred years, and calibrated age ranges at one sigma span 600 to 1,200 years. This makes it difficult to say precisely when the sandal-making tradition began, only that it was underway by at least 8,400 B.C.E. and probably earlier.
Organic materials like sagebrush bark survive poorly in most climates, meaning footwear traditions in wetter or more tropical environments are likely far older but simply undetectable in the archaeological record. The Great Basin’s aridity has given us an unusually clear window onto one moment in one region — not a complete picture of when or where humans first protected their feet.
Read more
For more on this story, see: University of Oregon — Fort Rock Sandals (Thomas J. Connolly)
For more from Good News for Humankind, see:
- Indigenous communities secure land rights covering 160 million hectares
- Ghana establishes marine protected area at Cape Three Points
- The Good News for Humankind archive on prehistory
About this article
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