Martin-Castillo Expedition
Big Lake, Reagan County, Texas
Marker Inscription
Explored the Concho River, 32 miles north of here, gathering information on Jumano Indians and searching for pearls, 1650. Setting out from Santa Fe, Capts. Hernan Martin and Diego Del Castillo traveled about 600 miles to the Jumano territory, where they stayed for 6 months. Further travels took them to the edge of the Texas nation, where they obtained the first information definitely about the tribe that gave Texas its name. The "discoveries" of their journey -- pearls and the Texas nation -- sparked later important Spanish expeditions to East Texas.
Erected by Texas Historical Commission
The Story
In 1650, Spanish captains Hernán Martín and Diego del Castillo set out from Santa Fe on a roughly 600-mile journey to the Concho River country, where they spent six months among the Jumano Indians and searched the river for pearls. Their travels carried them to the edge of the land of a people whose name — Texas — they carried back, along with tales of pearls. Those reports helped spark later, more ambitious Spanish expeditions into East Texas.
Why it matters
This early expedition is one of the first documented European contacts with the peoples of central Texas and helped fix the name "Texas" in the Spanish imagination.
The story behind this marker
AI contextThe era
In 1650 the land that would become Texas was far from any European settlement. Spain's northern frontier was centered on New Mexico, where Santa Fe had been founded some forty years earlier as a remote colonial capital. To the east and south lay a huge territory known to the Spanish mostly from rumor and the accounts of Native travelers and traders.
That territory was full of people. Among them were the Jumano, a Native people known across the region as long-distance traders who moved goods and information between the Pueblo villages of New Mexico and the peoples of the southern plains. Spanish officials in Santa Fe had heard of them for decades, and the Jumano country along the rivers of west-central Texas became a destination for expeditions.
Spain's colonial ambitions were driven partly by faith, partly by strategy, and partly by the hope of wealth. Reports of pearls, a real treasure found in freshwater mussels in the rivers, were enough to send men hundreds of miles into unknown country.
People & events
In 1650 two Spanish captains, Hernán Martín and Diego del Castillo, rode out of Santa Fe on a journey of about 600 miles into the Jumano country. Their route brought them to the Concho River, about 32 miles north of this marker. There they searched for pearls and gathered information about the Jumano people who lived there.
They stayed among the Jumano for six months, long enough to learn a great deal and to depend on their hosts' knowledge of the land. Details of daily life on the expedition are not fully recorded, but a stay that long could not have succeeded without cooperation from the people whose country they were visiting.
The captains then pushed farther, to the edge of the lands of the Texas, or Tejas, people. According to the marker, the information they brought back was the first definite knowledge of the people whose name would one day belong to the whole state. They returned to Santa Fe carrying pearls and word of the Tejas, and both helped set later Spanish expeditions in motion.
Its place in the American story
Texas takes its name from a word Spanish explorers learned from Native people. It is generally understood to come from a Caddo word meaning 'friends' or 'allies,' which the Spanish applied to the Caddo-speaking peoples of East Texas. The Martín-Castillo expedition was one of the early steps that brought that name into the European record. A state's identity began with an exchange between travelers and the people they met.
The expedition is also a reminder that the history of the American Southwest did not begin with English colonies on the Atlantic coast. By 1650, Spanish colonists had been in New Mexico for decades. The stories of North America include many threads that started in the Spanish borderlands and in the Native nations that lived there long before any European arrived.
Finally, this journey shows the chain reaction of early exploration: one expedition's reports, even exaggerated ones, sparked the next. The later Spanish push into East Texas, with its missions and presidios, grew partly out of hopes and rumors carried home by travelers like these.
If you visit
The marker stands in Big Lake, on the broad plains of West Texas, where the horizon seems to go on forever. It rewards a moment of imagination: picture a small party on horseback crossing this dry, open country after hundreds of miles from Santa Fe, looking for a river and the people who lived beside it.
The Concho River country the captains explored lies to the north, and the region around San Angelo makes a natural next stop. The river's freshwater pearls are still part of local lore, and seeing the water helps explain why it drew explorers here.
It is a good stop on a West Texas road trip for travelers interested in the long, layered history of the Spanish borderlands and the Native peoples who met them. Distances out here are long, so plan fuel and water ahead, and take time to notice how the land itself shaped every journey across it.
Written by AI to add context, grounded in the marker’s inscription and the historical record. The inscription above is the original, unaltered text.
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Related people
- · Hernán Martín
- · Diego del Castillo
Related events
- · Martin-Castillo Expedition
Themes & tags
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