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History of Colorado Timeline
(10,000 BCE – Present)The history of Colorado spans thousands of years, beginning with Paleo-Indians and Ancestral Puebloans whose cliff dwellings still stand at Mesa Verde. Spanish and French explorers claimed the region in the 16th–18th centuries before it became part of the United States through the Louisiana Purchase and Mexican Cession. The 1858 Pikes Peak Gold Rush transformed Colorado into a booming mining territory, leading to its statehood on August 1, 1876—the Centennial State. The 20th century saw a shift from mining to agriculture, tourism, and technology, shaping modern Colorado's diverse economy. More Less
Early History
San Carlos settlement founded
1787
In 1787 Juan Bautista de Anza established the settlement of San Carlos near present-day Pueblo, Colorado, but it quickly failed.
Image source: History of Colorado
Adams-Onís Treaty cedes land to Spain
1819
In 1819, the United States ceded its claim to the land south and west of the Arkansas River to Spain with the Adams-Onís Treaty, at the same time purchasing Florida.
Image source: Adams–Onís Treaty
Mexico gains independence from Spain
Aug 24, 1821
Mexico won its independence with the Treaty of Córdoba signed on August 24, 1821, and assumed the territorial claims of Spain, including lands in present-day Colorado.
Image source: Treaty of Córdoba
Ute control limits settlements
1832 - 1851
These early settlements were largely unsuccessful because the Utes continued to control the land until 1851.
Image source: Ute people
Trading posts along the Arkansas Valley
1832 - 1856
During the early history of the Arkansas Valley in Colorado from 1832 to 1856, traders, trappers, and settlers established trading posts and small settlements along the Arkansas River, and on the South Platte near the Front Range.
Territorial Era
United States goes to war with Mexico
1846 - 1848
In 1846 the United States went to war with Mexico. Mexico's defeat forced the nation to relinquish its northern territories by the Treaty of Guadalupe Hidalgo in 1848.
Image source: Mexican–American War
New western territories organized
1850 - 1854
The newly gained land was divided into the Territory of New Mexico and the Territory of Utah, both organized in 1850, and the Territory of Kansas and the Territory of Nebraska, organized in 1854.
Treaty of Fort Laramie signed
1851
The 1851 Treaty of Fort Laramie formed a basis for relations with the local Arapaho and Cheyenne tribes.
Image source: Treaty of Fort Laramie (1851)
San Luis founded as first permanent European settlement
Apr 9, 1851
On April 9, 1851, Hispanic settlers from Taos, New Mexico, settled the village of San Luis de la Culebra, then in the New Mexico Territory, but now Colorado's first permanent European settlement.
Image source: San Luis, Colorado
Golden becomes capital of Jefferson Territory
1860
Key Facts
- Ancient Puebloans built elaborate cliff dwellings at Mesa Verde around 1200 CE, now preserved as Mesa Verde National Park.
- The 1858 discovery of gold near Cherry Creek sparked the Pikes Peak Gold Rush, bringing over 100,000 prospectors to the region.
- Colorado became the 38th U.S. state on August 1, 1876, earning the nickname 'Centennial State' because it joined during America's centennial year.
- The 1864 Sand Creek Massacre, where U.S. soldiers killed over 150 Cheyenne and Arapaho people, remains one of the darkest events in Colorado history.
- Colorado's economy shifted dramatically in the 20th century from silver and gold mining to tourism, agriculture, aerospace, and technology industries.
Source
This History of Colorado timeline was generated with the help of AI, using information found on the internet.
We work hard to keep these timelines accurate, but mistakes do get through. If you spot one, email us at [email protected] and we'll fix it for future visitors.
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