What Happened to Arapaho People?
The Arapaho are a Native American tribe with a rich history as nomadic buffalo hunters on the Great Plains, who today are primarily organized into two federally recognized entities: the Northern Arapaho Tribe on the Wind River Reservation in Wyoming and the Cheyenne and Arapaho Tribes in Oklahoma. Despite historical challenges including forced displacement and assimilation efforts, the Arapaho continue to actively preserve their language and culture, engage in economic development, and assert tribal sovereignty, facing contemporary issues such as cybersecurity threats and land disputes as of 2026.
Quick Answer
The Arapaho people, historically nomadic Plains tribes, are currently organized into the Northern Arapaho Tribe in Wyoming and the Cheyenne and Arapaho Tribes in Oklahoma. Both tribes are actively engaged in cultural preservation, including critical language revitalization efforts, and economic development. Recent developments in 2026 include the Northern Arapaho Tribe asserting sovereignty through new policies regarding outside organizations on their lands, and the Cheyenne and Arapaho Tribes recovering from a significant ransomware attack while continuing to advocate for the return of ancestral lands like Fort Reno.
📊Key Facts
📅Complete Timeline13 events
Arapaho Tribe Splits into Northern and Southern Groups
The Arapaho, originally a unified nomadic tribe, divided into Northern and Southern factions, largely due to their expanding territories and interactions with other tribes and settlers.
Sand Creek Massacre
Colorado Territory militia attacked a peaceful encampment of Cheyenne and Arapaho, killing approximately 150-500 Native Americans, primarily women, children, and the elderly. This event significantly impacted the Southern Arapaho.
Establishment of Wind River Reservation
The Wind River Reservation in Wyoming was established, becoming the home for the Northern Arapaho Tribe, shared with the Eastern Shoshone.
Land Buy-Back Program for Cheyenne and Arapaho Tribes
The U.S. Department of the Interior sent purchase offers to nearly 3,000 landowners with fractional interests at the Cheyenne and Arapaho Tribes location in Oklahoma as part of the Cobell Settlement's land consolidation efforts.
Supreme Court Rules in Favor of Northern Arapaho on Healthcare Funding
The U.S. Supreme Court ruled 5-4 that the government must cover administrative costs for tribes, including the Northern Arapaho, that contract to run their own healthcare programs, preventing a systemic funding shortfall.
Wind River Reservation Embarks on Major Economic Development
The Wind River Development Fund secured $36 million to generate jobs through bison restoration, ecotourism, and food sovereignty initiatives, marking one of the reservation's largest economic development efforts.
Additional Land Proclaimed as Reservation for Cheyenne and Arapaho Tribes
The Assistant Secretary—Indian Affairs proclaimed approximately 79.21 acres in Woodward County, Oklahoma, as an addition to the reservation of the Cheyenne and Arapaho Tribes.
Digital Linguists Work to Save Arapaho Language
A team at the University of Colorado Boulder and the Northern Arapaho Language and Culture Commission are deploying digital tools, including a database of over 100,000 Arapaho sentences, and developing a curriculum to revitalize the endangered Arapaho language.
Cheyenne and Arapaho Tribes Hit by Ransomware Attack
A ransomware intrusion disrupted schools and government systems for the Cheyenne and Arapaho Tribes. The Rhysida ransomware group claimed responsibility, demanding 10 bitcoin, but the tribe refused to negotiate.
Farm Bill Draft Threatens Fort Reno Land Return to Cheyenne and Arapaho Tribes
A new draft of the 2026 Farm Bill includes language that would permanently block the transfer of 9,500 acres at Fort Reno to the Cheyenne and Arapaho Tribes, renewing a long-standing land dispute.
Cheyenne and Arapaho Tribes Receive STEP Grant for Education
The Cheyenne and Arapaho Tribes received an $890,924 State Tribal Education Partnership (STEP) grant to enhance educational choice for K-12 students, focusing on integrating culture with academics.
Northern Arapaho Adopts Policy on Outside Organizations
The Northern Arapaho Business Council adopted a policy requiring outside charitable, ministry, and outreach organizations to consult with and receive tribal authorization before conducting recurring activities on the Wind River Reservation.
Wind River Church Dispute Continues
Protests continue outside Foundations for Nations Church on the Wind River Reservation, following a pastor's sermon condemning Arapaho spiritual practices. The church has been barred from transporting children, and the pastor sought civil protection orders against Native women organizers.
Follow this story
Get an email when this timeline gets a major update.
🔍Deep Dive Analysis
The Arapaho are an Algonquian-speaking Native American tribe with a history rooted in the Great Plains, known for their nomadic lifestyle centered around buffalo hunting. Their traditional territories spanned parts of present-day Wyoming, Colorado, Nebraska, and Kansas. Following westward migration, the tribe eventually split into Northern and Southern groups around 1830. This division led to the establishment of the Northern Arapaho Tribe, which shares the Wind River Reservation in Wyoming with the Eastern Shoshone Tribe, and the Cheyenne and Arapaho Tribes, a federally recognized entity headquartered in Concho, Oklahoma, in a long-standing alliance with the Cheyenne people.
Throughout the 19th century, the Arapaho faced increasing pressure from Euro-American expansion, leading to conflicts such as the tragic Sand Creek Massacre in 1864, which significantly impacted the Southern Arapaho. Treaties and forced removals drastically reduced their ancestral lands, confining them to reservations. Despite these historical traumas, the Arapaho have maintained strong cultural and spiritual traditions, including the Sun Dance, which remains a cornerstone of their spiritual life.
In recent years, both Northern and Southern Arapaho communities have focused on strengthening tribal sovereignty, economic self-sufficiency, and cultural preservation. The Northern Arapaho Tribe, with over 8,600 enrolled members on the Wind River Reservation, has pursued economic development initiatives such as bison restoration, ecotourism, and food sovereignty, backed by significant funding in 2024. In 2024, the Northern Arapaho Tribe, along with the San Carlos Apache Tribe, secured a favorable Supreme Court ruling that requires the U.S. government to cover more health care costs for tribes, preventing systemic funding shortfalls for self-determination contracts. Housing assistance also saw federal grants in 2025.
Language revitalization is a critical ongoing effort, as fewer than 100 fluent Arapaho speakers remain, all over the age of 70. The University of Colorado Boulder, in collaboration with the Northern Arapaho Language and Culture Commission, is developing a digital database and curriculum to teach the Arapaho language to younger generations, with 5,000 approved sentences expected to be published online by November 2025.
Recent events in 2026 highlight ongoing challenges and assertions of tribal governance. In July 2026, the Northern Arapaho Business Council adopted a new policy requiring outside organizations to consult with and receive authorization before operating on tribal lands, following a controversial sermon by a pastor condemning Arapaho spiritual practices. This policy, aimed at upholding tribal sovereignty and protecting Indigenous cultures, has led to ongoing protests and legal disputes as of September 2026. Meanwhile, the Cheyenne and Arapaho Tribes of Oklahoma, governing approximately 12,000 residents, faced a significant ransomware attack in December 2025 that disrupted schools and government systems. The Rhysida ransomware group claimed responsibility, demanding a bitcoin ransom, which the tribe refused to pay, with recovery efforts continuing into February 2026. The Cheyenne and Arapaho Tribes are also continuing their decades-long efforts to regain approximately 9,500 acres of land at Fort Reno, which they claim was never properly compensated. A March 2026 draft of the Farm Bill, however, includes language that could permanently block this land transfer, renewing the dispute. The tribe's Department of Business and Community Development Corporation continue to promote entrepreneurial growth and financial self-sufficiency, with an updated Comprehensive Economic Development Strategy (CEDS) plan for 2023-2027.
What If...?
Explore alternate histories. What if Arapaho People made different choices?