06/10/2026
Today, we recognized and honored the 171st anniversary of the signing of the Treaty of 1855 between the Confederated Tribes and Bands of the Yakama Nation (“Yakama Nation”) and the United States of America.
On June 9th, 1855, tribal leaders from 14 Tribes and Bands across the Pacific Northwest region signed the Treaty of 1855 with the United States - officially forming the Yakama Nation. The signatories included leaders from the Tribes and Bands of the Yakama, Palouse, Pisquouse, Wenatshapam, Klikatat, Klinquit, Kow-was-say-ee, Li-ay-was, Skin-pah, Wish-ham, Shyiks, Oche-chotes, Kah-milt-pah, and Se-ap-cat.
When signing the Treaty, the Yakama Nation ceded 11.5 million acres of land to the United States, defined the boundaries of the 1.2 million acre Yakama Indian Reservation, and reserved the rights the Yakama people are entitled to today within the Yakama Reservation boundaries and its Treaty Territories, or ceded lands. The language within the Treaty was crafted with future generations in mind - ensuring there are both independent and collaborative efforts for traditional resource restoration and protections, fair trade and travel, and more rights that are utilized in day-to-day life.
Today we recognize the circumstances in which our ancestors signed the treaty under and the consideration they presented to ensure the rights and safety for future generations to be at the forefront.
This governing document, ratified by Congress, serves as a beacon for the work the Yakama Nation leadership, government, and membership conduct. Our tribal government advocates for our own community and the United States leadership to continue honoring our obligations for those yet unborn and will continue to work in recognition for generations past, present, and future. We take pride in continuing the legacy of the Confederated Tribes and Bands of the Yakama Nation.
Thank you for taking the time to recognize, honor, and learn about the Treaty of 1855. Many resources are available within the Yakama Nation government, programs, enterprises, and community to learn more and understand the significance this document holds.
To read and learn more about the Treaty of 1855, you can visit our website at www.yakama.com. Additionally, educational materials are available on www.yakamastrong.com.
(Pictured: Chairman Gerald Lewis, Yakama Nation Treaty Days Parade 2024)