Trinidad,Colorado
Its development
Between 1821 and 1880, the Santa Fe Trail was primarily a commercial highway connecting Missouri and Santa Fe, New Mexico used by both Mexican and American traders until 1846, when the Mexican-American War began.
A few months later, America’s Army of the West followed the Santa Fe Trail westward to successfully invade Mexico. After the Treaty of Guadalupe Hidalgo ended the war in 1848, the Santa Fe Trail became a national road connecting the more settled parts of the United States to the new southwest territories. Commercial freighting along the trail boomed, including considerable military freight hauling to supply the southwestern forts. The trail was also used by stagecoach lines, thousands of gold seekers heading to the California and Colorado gold fields, adventurers, missionaries, wealthy New Mexican families, and emigrants.
The Colorado portion of the Trail was known as the Mountain Branch and extended from the border of eastern Colorado near Lamar, southwesterly into Trinidad and over Raton Pass to Santa Fe, New Mexico. Want to learn more? Check out canyonsandplains.org.
...And its demise
In 1866, one year after the Civil War ended, an unprecedented period of railroad expansion began in the new state of Kansas. Within two years, rails had been laid across central Kansas, and by 1873, two different rail lines reached all the way into Colorado. In the early 1870s, three railroads competed to build rails over Raton Pass to serve the New Mexico market. The Atchison, Topeka, and Santa Fe Railroad prevailed and reached the top of Raton Pass in late 1878. In February 1880, the railroad reached Santa Fe, and with that, the Santa Fe Trail fell into disuse and slowly began fading into the past.