HistoricSiteMarkers
Reconstruction & Gilded Age

Moapa Valley

Clark County, Clark County, Nevada

Marker Inscription

Moapa Valley. Rich in Pueblo-type culture, and noted by the explorer Jedediah Smith in 1826, Moapa Valley is crossed by the Old Spanish Trail.In 1865, Brigham Young sent 75 families to settle the area, to grow cotton for the people of Utah, and to connect Utah with the Pacific Ocean via the Colorado River.Located near the junction of the Muddy and Virgin Rivers, and now under Lake Mead, the “cotton mission” was named St. Thomas for its leader, Thomas Smith.  Mormons built a prosperous, self-contained agricultural industry in the valley, which included orchards, vineyards, cotton, grains, and vegetables.The December 1870 survey placed the valley in Nevada, which meant property owners owed back taxes to Nevada.  The settlers, now including those in St. Joseph, (old) Overton, West Point, and Logandale, began leaving two months later.  They abandoned the results of 7 years of labor, more than 18 miles of irrigation canal, and several hundred acres of cleared land.Other Mormons resettled the land in 1880.  The area remains one of the most agriculturally productive in the state.

Erected by Southern Nevada Historical Society

The Story

Long a home to Puebloan farming peoples and noted by trapper Jedediah Smith in 1826, the Moapa Valley near the junction of the Muddy and Virgin Rivers drew Mormon settlers in 1865. Sent by Brigham Young to grow cotton and open a Colorado River route to the Pacific, they built the "cotton mission" of St. Thomas and raised orchards, vineyards, grain, and cotton. When an 1870 survey placed the valley in Nevada and saddled residents with back taxes, they abandoned years of labor and miles of canals. Others returned in 1880, and the valley remains among Nevada's most productive farmland.

Why it matters

The valley's story captures how boundary lines and taxes could unmake a frontier community overnight, and how irrigation turned desert into one of the state's agricultural heartlands.

Own a business near here? Add it to the map.

Related people

  • · Jedediah Smith
  • · Brigham Young
  • · Thomas Smith

Themes & tags

Nearby & related markers

Powell Of The Colorado

Clark County, NV

On August 30, 1869, Major John Wesley Powell and his weary crew reached the mouth of the Virgin River, completing the first expedition through the Grand Canyon of the Colorado. They had launched from Green River City, Wyoming Territory, three months earlier, enduring rapids, hunger, and the unknown to survey and study the great river canyons. Near starvation at journey's end, the party was fed by Mormon farmers at nearby St. Thomas. The original settlement and river junction now lie beneath Lake Mead.

Las Vegas Old Mormon Fort (Nevada's Oldest Building)

Las Vegas, NV

In June 1855, thirty-two Mormon missionaries from Utah arrived at this spring-fed valley and set to building a 150-foot-square adobe fort, planting fields and orchards in the desert. Most left by 1857, and the sturdy walls passed to rancher Octavius Decatur Gass, who ran cattle and supplied nearby miners. Helen J. Stewart later grew the ranch to 1,800 acres before selling it to the railroad, whose 1905 land auction founded modern Las Vegas. The old adobe remains Nevada's oldest building.

Las Vegas (The Meadows)

Las Vegas, NV

Artesian springs once rose from this desert floor, sending streams across the valley to water lush meadows — the vegas, or "meadows," that gave Las Vegas its name. For generations the oasis was the winter home of Southern Paiutes, and it became a vital resting stop on the Old Spanish Trail after Antonio Armijo's trading party passed nearby in 1829–30. John C. Fremont camped here in 1844 and mapped the site; Mormons founded a mission and fort in 1855; and in 1905 a railroad company acquired the water rights and platted the City of Las Vegas.

Ghost Town of White Hills

Mohave County, AZ

A few miles off this road lie the ruins of White Hills, a mining boom town that flared to life in 1892 and was largely gone by 1898. In just six years its mines yielded some twelve million dollars in gold and silver, with the original strike credited to a Native prospector. Today only foundations and scattered debris remain of the once-bustling camp.