El Sal del Rey, C.S.A.
Edinburg, Hidalgo County, Texas
Marker Inscription
Front side: Large salt lake located 26 miles northeast was principal source of salt in South Texas during the Civil War. Put under state guard and agent 1862. Salt sold to families, Texas Military Board, Army of Confederacy and wagons returning north on cotton road-vital trade route for South thru Mexico. Due to military and domestic importance, Union forces periodically wrecked the salt works from November 1863 until war's end. It was also a Texas Confederate base for the 1864 recapture of Brownsville. A memorial to Texas who served the Confederacy; erected by the State of Texas 1963. Back side: Salting or smoking were only was to preserve meat at time of Civil War. When South levied a meat tithe, salt necessary to cure bacon and beef for military. Salt was a must for horses and mules used by cavalry, artillery and supply wagons. Hides were preserved with it to make leather for shoes and harness. Other wartime salt works were operated along coast and in 7 counties in central, east and west Texas. El Sal del Rey, Spanish for "Salt for the King" also played a significant role in the history of Texas mineral law. A legal controversy raged for years over its ownership. Under Spain, mineral rights belonged to crown. Mexico retained the principle of the state ownership of minerals. Texas, as Republic and State, kept minerals in the public domain. Private possession of the lake began with the 1866 Texas Constitutional Convention which relinquished all minerals to landowners. The principle of private ownership was readopted in the Constitutions of 1869 and 1876.
Erected by Texas Historical Commission
The Story
This large natural salt lake northeast of Edinburg was South Texas's principal source of salt during the Civil War, placed under state guard in 1862 and sold to families, the Confederate army, and traders on the vital "cotton road" through Mexico. Salt was indispensable to the wartime South—for curing meat under the meat tithe, tending cavalry horses, and tanning leather for shoes and harness—so Union forces repeatedly wrecked the works from 1863 until war's end. The lake also figured in the long legal fight over Texas mineral ownership, settled toward private landowners in the constitutions of 1866 and after.
Why it matters
El Sal del Rey shows how a humble mineral became a strategic resource that shaped Confederate logistics and border trade, while its ownership disputes helped define Texas mineral law for generations.
The story behind this marker
AI contextThe era
When the Civil War began, the Confederacy faced a problem that sounds humble but was urgent: salt. In the 1860s, salting or smoking was the only practical way to preserve meat, and armies ran on salted pork and beef. The Union blockade cut off imported salt, and prices across the South soared.
Deep South Texas had an answer that nature had already provided. About twenty-six miles northeast of present-day Edinburg lies El Sal del Rey, a large natural salt lake so salty that crystals form along its shores. People had harvested salt here for generations before the war.
The lake also sat close to one of the Confederacy's most important lifelines. With Southern ports blockaded, cotton moved overland across Texas to the Rio Grande and into Mexico, where it could be sold to the world. Wagons carried it down the so-called cotton road. El Sal del Rey was near that route, which made it valuable twice over.
People & events
In 1862 Texas put the salt lake under state guard and appointed an agent to run it. Salt went to local families, to the Texas Military Board, and to the Confederate army. Wagons that had hauled cotton south to the border loaded up with salt for the trip back north, so they didn't travel empty.
The salt had many uses. When the Confederacy collected a tithe of meat for its soldiers, curing that bacon and beef took salt. Cavalry horses, artillery teams, and the mules pulling supply wagons all needed it. Hides were salted so they could be made into leather for shoes and harness. Texas operated other salt works during the war, along the coast and in seven counties in the interior, but this lake was the main source for South Texas.
Because it mattered so much, it became a target. Union forces landed on the lower Rio Grande in late 1863 and occupied Brownsville. From November 1863 until the war ended, they periodically raided and wrecked the salt works. The Confederates kept coming back. The lake also served as a Texas Confederate base for the 1864 campaign that recaptured Brownsville.
Its story did not end with the war. The name means "Salt for the King" in Spanish, and it reflects an old legal principle. Under Spain, minerals belonged to the crown. Mexico kept minerals as state property, and the Republic and then the State of Texas kept them in the public domain. That made ownership of the lake the subject of a long legal fight, until the 1866 Texas Constitutional Convention gave mineral rights to landowners. The Constitutions of 1869 and 1876 confirmed that principle.
Its place in the American story
Civil War history usually focuses on battles, but wars are won or lost on supply too. El Sal del Rey shows how much the Confederacy depended on ordinary materials. Without salt there was no preserved meat, no healthy draft animals, and no leather for boots. The repeated Union raids show the North understood this.
The lake also connects to a little-known chapter of the war: the Rio Grande border. Trade through Mexico became one of the South's key economic outlets, and the lower Rio Grande became a contested front between the Union and the Confederacy.
The legal story may matter even more over time. The decision that mineral rights in Texas belong to private landowners, instead of the state, shaped how Texans would own and profit from what lay underground. That principle became enormously important when oil and gas made subsurface rights some of the most valuable property in America.
If you visit
This marker is in Edinburg, in the heart of the Rio Grande Valley. The lake itself lies about twenty-six miles to the northeast in open brush country. When you stand at the marker, picture the distance wagons had to cover, and the long haul north on the cotton road.
If you go out to see the lake, expect a wide, flat, shimmering basin. Its shoreline can look almost frosted. It is a striking natural sight, and much of the surrounding land is now protected habitat, so watch for birds and respect any posted rules.
El Sal del Rey fits well into a Rio Grande Valley road trip built around border history, from Brownsville's Civil War story to the old trade routes along the river. It's also a good place to talk with kids about how something as everyday as table salt once mattered enough for armies to fight over.
Written by AI to add context, grounded in the marker’s inscription and the historical record. The inscription above is the original, unaltered text.
Own a business near here? Add it to the map.
Themes & tags
Nearby & related markers
El Sal del Rey
Linn, TX
On the South Texas plains northeast of Linn lies a natural salt lake the Spanish claimed for the crown upon its discovery in 1746, invoking the old principle that salt itself was a form of money. For generations people across a wide region hauled away salt from its shores, and during 1863–64 its works helped supply Confederate Texas. Later legal battles over who owned the lake helped shape the state's foundational laws on private mineral ownership.
W. L. Lipscomb
Edinburg, TX
William Lawton Lipscomb came to Texas as a boy around 1880 and by 1894 had settled in the Rio Grande Valley's Hidalgo County, first managing a sugar plantation and later opening one of Edinburg's earliest general stores. In 1910 he moved his mercantile business into this newly finished building, running it while serving sixteen years as a county commissioner. His career captures the commercial coming-of-age of the lower Valley in the early twentieth century, as railroads and irrigation turned ranch country into towns.
Everitt Building
Edinburg, TX
Completed in 1910 by townsite founder John Closner, the Everitt Building was among Edinburg's earliest commercial structures. Over the years it sheltered a hardware store, a World War I Red Cross workshop, the Golden Jersey Creamery, a Masonic lodge, and E. M. Everitt's grocery. It stands as a survivor of the young city's economic beginnings.
Southern Pacific Depot
Edinburg, TX
Opened in 1927 as the Southern Pacific pushed its rails deep into South Texas, this Edinburg depot became a lifeline for the Rio Grande Valley's booming citrus and vegetable trade. Designed by railroad architect Leonard B. McCoy in graceful Spanish Colonial Revival style — tile detailing, double entries, built-in benches — it carried passengers until 1952 and freight until 1982. The building marks the moment the Valley connected to the wider national economy.