Colorado River Indian Reservation in California: History, Culture and Important News

The Colorado River Indian Reservation crosses the California-Arizona border, joining four Tribal communities whose cultures, economy and future remain closely connected to the river.

Published August 21, 2026 • NativeAmericanNews.org Editorial Staff

The Colorado River Indian Reservation is one sovereign homeland in two states. Its lands extend along the Colorado River in western Arizona and southeastern California, so it is important not to describe the reservation as belonging exclusively to either state. The California portion includes land in Riverside and San Bernardino counties, while the reservation's governmental headquarters and largest community are in Parker, Arizona. The river forms both a geographic connection and the cultural and economic center of this desert homeland.

The federally recognized Colorado River Indian Tribes, commonly known as CRIT, bring together four distinct peoples: the Mohave, Chemehuevi, Hopi and Navajo. Each maintains its own heritage and traditions while participating in a unified Tribal government. According to CRIT, the reservation contains almost 300,000 acres. Federal planning documents describe it as extending roughly 56 miles from north to south, and regional profiles note approximately 90 miles of Colorado River shoreline.

Colorado River Indian Reservation Quick Facts

Tribal government: Colorado River Indian Tribes (CRIT)
Peoples: Mohave, Chemehuevi, Hopi and Navajo
Location: Western Arizona and southeastern California
California counties: Riverside and San Bernardino
Headquarters: Parker, Arizona
Established: March 3, 1865
Size: Nearly 300,000 acres

A Homeland Shaped by the Colorado River

Long before reservation boundaries appeared on maps, the Mohave and Chemehuevi peoples lived in and traveled through the lower Colorado River region. Mohave communities developed farming traditions along the river's floodplain, while Chemehuevi families maintained far-reaching cultural and family connections across the desert. The reservation was established by an Act of Congress on March 3, 1865, for “Indians of the Colorado River and its tributaries.” It was originally intended principally for the Mohave and Chemehuevi. Hopi and Navajo people were relocated to the reservation in later years.

The reservation era brought severe disruption, including disease, outside settlement pressure and federal control of Tribal land and resources. Irrigation development eventually transformed much of the Parker Valley. Today, farming remains central to the economy, with alfalfa, cotton, wheat and other crops grown on irrigated land. CRIT Farms and private agricultural operations provide employment and revenue, but agriculture also places the Tribes at the center of the West's most consequential water-policy debates.

Water Rights, Sovereignty and Important 2026 News

News update — August 21, 2026: The U.S. Department of the Interior finalized operating guidelines for Lake Powell and Lake Mead for 2027 and 2028, along with a broader decision framework for Colorado River operations through 2036. The federal documents were completed as the river system faced historic low storage and prolonged drought. Because the Colorado River supports CRIT homes, farms, wildlife habitat and cultural life, decisions about shortages and reservoir operations are of direct importance to the reservation.

CRIT has repeatedly emphasized that Tribal Nations must have a meaningful role in negotiations over the river. In August 2026, the Tribes publicly objected to what they viewed as an accelerated federal review schedule that did not provide enough time to analyze a major water-management proposal. The dispute highlights a larger principle: Tribal governments are sovereigns and senior water-right holders, not simply one more interest group in discussions among federal agencies and states.

The Colorado River Indian Tribes Water Resiliency Act of 2022, signed as Public Law 117-343, was an important milestone. The law authorized CRIT to enter into certain agreements involving the lease, exchange or storage of a portion of its Arizona Colorado River water. It strengthened the Tribes' ability to make decisions about their own water while creating possible tools for conservation, drought response and economic development. In December 2025, CRIT also adopted a policy resolution intended to ensure that future water transactions consider the needs of the river itself, reflecting the Tribes' long-standing relationship with the waterway.

Culture, Environment and Community Life

The Colorado River is more than a water supply. It is part of the identity, stories, ceremonies and traditional practices of the peoples who call the reservation home. Cultural continuity can be seen in language preservation, family gatherings, artistic traditions and public celebrations. The CRIT Museum and Library in Parker offers visitors an introduction to the histories of the four Tribes, while community events provide opportunities for Tribal members to celebrate living cultures rather than treating Native history as something confined to the past.

Environmental stewardship is equally important. The 'Ahakhav Tribal Preserve, established in 1995, protects more than 1,200 acres of riverfront wilderness and wetland habitat. Its backwaters, native vegetation and trails support birds, fish and other wildlife. The preserve also demonstrates how habitat restoration can coexist with education and carefully managed recreation. Visitors should remember that reservation lands are not ordinary public lands: local rules, closures and permit requirements must be respected.

The Poston Incarceration Site

One of the reservation's most difficult historic sites is at Poston, Arizona. During World War II, the federal government built the Colorado River Relocation Center on reservation land despite opposition from the CRIT Tribal Council. More than 17,000 Japanese Americans were incarcerated in three camps there over the course of the war. This history joins two experiences of federal injustice on the same landscape—Native dispossession and the wartime incarceration of people of Japanese ancestry.

Poston Elementary School, Unit I, is now a National Historic Landmark. Surviving structures, memorials and preservation projects help tell the stories of Japanese American incarcerees as well as the Tribal community. Visitors approaching the site should do so respectfully and understand that it is a place of memory, education and continuing community significance.

Visiting the Reservation Responsibly

Parker is the main gateway for learning about CRIT government, history and services. The broader river corridor is known for fishing, boating, camping and birding, but access varies by location and season. Tribal permits may be required for fishing, hunting or camping, and some lands may be closed for cultural, environmental or wildfire-protection reasons. Travelers should check current information directly with CRIT departments before entering undeveloped areas, launching watercraft or planning an overnight stay.

The Colorado River Indian Reservation's California lands are an integral part of a much larger cross-border homeland. Understanding the reservation means recognizing four living Tribal cultures, a sovereign government, a major agricultural community and a people whose stewardship decisions affect the future of the Colorado River. As the West enters a new and uncertain period of river management, CRIT's knowledge, rights and leadership will remain essential.