Fort Chambers and the Sand Creek Massacre

The City of Boulder has developed this webpage to provide a broad compilation of timeline information to help community members begin learning about the American-European colonization of Indigenous lands in the Boulder Valley, Fort Chambers, Company D and the Sand Creek Massacre. It is based on information in the city’s Indigenous Peoples Day Resolution, the city’s staff land acknowledgment, conversations with Tribal Representatives and American-European histories of the Boulder Valley and the Sand Creek Massacre.

We highly encourage our community to learn more about the Sand Creek Massacre and hear from Arapaho and Cheyenne Peoples themselves by visiting the exhibit, “The Sand Creek Massacre: The Betrayal that Changed Cheyenne and Arapaho People Forever.” The History Colorado exhibit was developed with guidance from the Cheyenne and Arapaho Tribes, the Northern Arapaho Tribe and the Northern Cheyenne Tribe.

• Since Time Immemorial: Thousands of generations of Indigenous Peoples have lived and thrived on ancestral homelands that Euro-Americans colonized as Boulder.(1)
• 1840s-1850s: The westward expansion of Euro-American populations and culture in the 19th century caused extensive hunger and diseases that devastated Indigenous Peoples’ way of life. American Europeans killed bison herds, burned wood Indigenous Nations needed for building, heating and cooking, and brought diseases, like smallpox and cholera that killed thousands of Indigenous Peoples.(2)
• 1851: Hinono’eino’ (Arapaho) and Tsétsėhéstȧhese (Cheyenne) Peoples and other Indigenous Nations signed the 1851 Treaty of Fort Laramie with the U.S. government that designated lands in Colorado – including Boulder – as Arapaho and Cheyenne lands.(3)
• October 1858: Hinono’ei neecee ("Arapaho Chief") Nowoo3 (“Niwot," "Lefthand") and other Hinono’eino’ (“Arapaho”) Peoples told a party of gold-seekers camped in what is now known as Boulder that they could not remain on Indigenous land as defined by the 1851 Treaty of Fort Laramie.(4) The gold-seekers refused the Hinono’eino’ request to leave.(5)
• February 10, 1859: After gold was found west of Boulder in January 1859, many of those same gold-seekers helped found the Boulder Town Company, in violation of the 1851 Treaty of Fort Laramie.(6)
• Summer and Fall 1859: Thousands of gold seekers were in the Boulder area.(7) When gold seekers found mining too difficult, many squatted Indigenous lands – joining other Americans and Europeans who had claimed Indigenous lands.(8) Their expansive occupation of Indigenous lands soon exiled Indigenous Nations from the Boulder area.
• 1861: While a few Arapaho and Cheyenne chiefs signed the Fort Wise Treaty, which “ceded” Indigenous lands in the Boulder area to the U.S. government, Southern Arapaho, Northern Cheyenne, Northern Arapaho Chiefs, including Chief Nowoo3, opposed the treaty. The U.S. government, however, insisted that the treaty – which some historians say was the result of likely corrupt translators – bound all tribes to a small reservation in southeastern Colorado.(9)
• Summer 1864: Exaggerated and false claims of Indigenous violence helped fan anti-Indigenous hatred among settlers in the Boulder area.(10) A man who participated in the Sand Creek Massacre wrote that the sentiment in 1864 was that “At the time the 3d Colorado regiment was raised, the idea was very general that a war of extermination should be waged; that neither sex nor age should be spared; and women held to these views in common with men."(11)
• Mid-August 1864: More than 100 Boulder County residents mobilized into Company D of the Third Colorado Cavalry at Fort Chambers, along Boulder Creek east of what is now known as Boulder.(12) Company D included 46 Boulder men and prominent Boulder County residents.(13) The company drilled at Fort Chambers until the 16th of September.(14)
• September 1864: Cheyenne and Arapaho chiefs sought peace, as told in History Colorado's exhibit, "The Sand Creek Massacre: The Betrayal that Changed Cheyenne and Arapaho People Forever": “Gov. Evans told Cheyenne Chief Black Kettle to bring a peaceful delegation to Camp Weld, the military outpost in Denver… [Gov. Evans and Col. John Chivington] told us if we went to Big Sandy Creek and stayed there, we would be considered peaceful and would be protected by U.S. troops. But Evans and Chivington betrayed us in the worst possible way.”(15)
• Oct. 10, 1864: At least 22 men of Company D attacked a Cheyenne camp near present-day Sterling ("Buffalo Springs") and murdered four Cheyenne women, three men, two babies and one boy.(16) A Company D soldier who would later participate in the Sand Creek Massacre criticized the killing of women and said the view of Company D soldiers “was strongly in opposition to my view of it." (17)People can learn more about this attack by reading Morse Coffin's "Battle of Sand Creek" and Henry Blake's diary. Both men were members of Company D and later participated in the Sand Creek Massacre.
• Nov. 29, 1864: The Boulder-area men of Company D participated in the unprovoked, surprise and barbaric massacre that killed 230 peaceful Arapaho and Cheyenne Peoples at Sand Creek on Nov. 29, 1864.(18) A map drawn by a survivor of the massacre indicates that Company D may have attacked Nowoo3’s (“Niwot,” “Lefthand”) camp.(19)
  • Arapaho and Cheyenne Peoples, in the Sand Creek Massacre exhibit at History, tell us: “Cheyenne Chief Black Kettle made sure the soldiers saw the white flag of surrender and the U.S. flag flying above our camp. Another important Cheyenne chief, White Antelope, pleaded with the soldiers to stop attacking the peaceful camp by singing a journey song. But he was shot. He died underneath the flags Colorado’s Governor Evans said would show that we were peaceful.”(20)
  • U.S. accounts from the Sand Creek Massacre indicated Company D men killed at least 25 people and participated in the killing of women, children, elders and chiefs.(21)
  • The massacre killed 23 Cheyenne and five Arapaho Chiefs – including Chief Nowoo3 – and caused devastating intergenerational harm to Arapaho and Cheyenne Peoples.(22)
• December 1864: Despite having participated in horrific atrocities, the Third Cavalry and Company D received a “heroes’ welcome” and even paraded Arapaho and Cheyenne body parts as victory trophies through Denver.
• January - April 1865: Investigations and testimony from whistleblowers like Silas Soule – who was murdered in Denver five months after the Sand Creek Massacre – detailed accounts of horrific barbarity by Third Cavalry and Company D soldiers.(24) A Congressional investigation of the Sand Creek Massacre – conducted in early 1865 – stated: “For more than two hours, the work of murder and barbarity was continued until more than one hundred dead bodies, three-fourths of them women and children, lay on the plain as evidence of the fiendish malignity and cruelty of the officers who had so sedulously and carefully plotted the massacre and of the soldiers who had so faithfully acted out the spirit of their officers.”(25)
• 1880: Despite investigations documenting the barbarity of the massacre, the Boulder community valorized those who participated in the massacre. An early history of Boulder – which many histories of the city are based on – stated: “The Boulder men were prompt to do their full share toward punishing [Arapaho/Cheyenne Peoples] into peace; and let it be recorded to their credit evermore."(26)
• 1959: Boulder community members and a descendent of the man who claimed the property where Fort Chambers once stood helped erect a monument to mark the location of the fort, falsely describing what occurred in 1864 as an “Indian Uprising."(27) At the time, Boulder community members called the horrific atrocities committed at Sand Creek Massacre a “battle."(28) Cheyenne and Arapaho Peoples have communicated their pain at seeing the Fort Chambers marker and have told city staff how the legacy of the massacre still affects descendants of Sand Creek survivors today.

No, historical sources indicate Fort Chambers – which was made of sod – was allowed to disintegrate. A former owner of the property claimed that the fort's walls were discernable in 1920 and said he later pulled up gate posts from the fort and gave them to a local museum. Those posts were reportedly later destroyed in a fire. Indications of the fort's remains or artifacts associated with Company D have not been found on the property by OSMP Cultural Stewardship Program staff.

1. City of Boulder. Land Acknowledgment.
2. Arapaho and Cheyenne Nations and History Colorado. The Sand Creek Massacre: The Betrayal that Changed Cheyenne and Arapaho Peoples Forever. Denver: History Colorado, 2022. Pg. 20
3. Crifasi, Bob. A Land Made from Water: Appropriation and the Evolution of Colorado’s Landscape, Ditches, and Water Institutions. Boulder, Colorado: University of Press of Colorado, 2016. Pg. 130
4. Bixby, Amos. "History of Boulder County’" in History of Clear Creek and Boulder Valleys." Chicago: O.L. Baskin & Co. Historical Publishers, 1880. Pg. 379.
5. Taylor, Bayard. Colorado: A Summer Trip. New York: G.P. Putnam and Sons, 1867. Pg. 159.
6. Smith, Phyllis. Boulder: From Settlement to City. Boulder, Colorado: Pruett Publishing, 1981. Pg. 17
7. Perrigo, Lynn. A Municipal History of Boulder 1871-1946. Boulder, Colorado: Boulder Historical Society and the City of Boulder 1946. Pg. 4
8. Crifasi, Bob. A Land Made from Water: Appropriation and the Evolution of Colorado’s Landscape, Ditches, and Water Institutions. Boulder, Colorado: University of Press of Colorado, 2016. Pg. 132
9. Kelman, Ari. A Misplaced Massacre: Struggling Over the Memory of Sand Creek. Cambridge, Massachusetts: Harvard University Press, 2013. Pg. 118
10. Crifasi, Bob. A Land Made from Water: Appropriation and the Evolution of Colorado’s Landscape, Ditches, and Water Institutions. Boulder, Colorado: University of Press of Colorado, 2016. Pg. 134
11. Coffin, Morse. “Battle of Sand Creek.”
12. Bixby, Amos. "History of Boulder County’" in History of Clear Creek and Boulder Valleys." Chicago: O.L. Baskin & Co. Historical Publishers, 1880. Pg. 398.
13. Taylor, Carol. “Boulder County Shares in Sand Creek Massacre Infamy.” Boulder Daily Camera, Nov. 15, 2014.
14. Bixby, Amos. "History of Boulder County’" in History of Clear Creek and Boulder Valleys." Chicago: O.L. Baskin & Co. Historical Publishers, 1880. Pg. 398
15. Arapaho and Cheyenne Nations and History Colorado. The Sand Creek Massacre: The Betrayal that Changed Cheyenne and Arapaho Peoples Forever. Denver: History Colorado, 2022. Pg. 30
16. Coffin, Morse. “Battle of Sand Creek.
17. Coffin, Morse. “Battle of Sand Creek.
18. Arapaho and Cheyenne Nations and History Colorado. The Sand Creek Massacre: The Betrayal that Changed Cheyenne and Arapaho Peoples Forever. Denver: History Colorado, 2022. Pg. 30
19. Coel, Margaret. Chief Left Hand: Southern Arapaho. Norman, Oklahoma: University of Oklahoma Press, 2000. Pg. 233
20. Arapaho and Cheyenne Nations and History Colorado. The Sand Creek Massacre: The Betrayal that Changed Cheyenne and Arapaho Peoples Forever. Denver: History Colorado, 2022. Pg. 30
21. Second report by Col. George Shoup, 3rd Calvary, Dec. 7, 1864, in “The Sand Creek Massacre: The Official 1865 Congressional Report with James P. Beckwourth’s Additional Testimony and Related Documents.” (Westholme Publishing, 2015)
22. Arapaho and Cheyenne Nations and History Colorado. The Sand Creek Massacre: The Betrayal that Changed Cheyenne and Arapaho Peoples Forever. Denver: History Colorado, 2022. Pg. 31
23. Arapaho and Cheyenne Nations and History Colorado. The Sand Creek Massacre: The Betrayal that Changed Cheyenne and Arapaho Peoples Forever. Denver: History Colorado, 2022. Pg. 38
24. Kelman, Ari. A Misplaced Massacre: Struggling Over the Memory of Sand Creek. Cambridge, Massachusetts: Harvard University Press, 2013. Pg. 176
25. U.S. Congress. Report of the Joint Committee on the Conduct of War: Massacre of Cheyenne Indians. 38th Congress, 2nd Session, 1865, in “The Sand Creek Massacre: The Official 1865 Congressional Report with James P. Beckwourth’s Additional Testimony and Related Documents.” (Westholme Publishing, 2015)
26. Bixby, Amos. "History of Boulder County’" in History of Clear Creek and Boulder Valleys." Chicago: O.L. Baskin & Co. Historical Publishers, 1880. Pg. 400.
27. Daily Camera. “Monument Marking Site of Fort Chambers Erected on Hummel Farm.” Nov. 23, 1959
28. Patricia Nelson Limerick, Jeffrey Hickey, Richard DiNucci. Boulder: What's in a Name? Nichols Hall: A Report. 1987. Boulder: Center for the American West, University of Colorado, 1987. Pg. 3