In 1851 and 1852, agents of the United States government traveled through California negotiating treaties with Indigenous peoples. Eighteen treaties were signed, promising approximately 7.5 million acres of land to California's tribes in exchange for the cessation of their claims to the rest of the state. The Senate never ratified them. Under an injunction of secrecy, the treaties were buried — not filed, not officially rejected, simply hidden — until 1905, when they were finally unsealed. By then, more than fifty years had passed. The people who signed them, or whose parents and grandparents had signed them, had long been living with the consequences of a promise that the government had chosen to forget.
The eighteen California treaties of 1851 to 1852 represent one of the more striking episodes in the long history of broken agreements between the United States government and Indigenous peoples. Unlike treaties that were ratified and then violated — a pattern common enough across American history — these were never ratified at all. California's congressional delegation opposed them, arguing that the land promised was too valuable to cede to tribes. The Senate agreed and quietly set the treaties aside.
The injunction of secrecy meant that even the tribes who had signed did not know the official status of the agreements they had made. They had ceded claims to most of California on the understanding that 7.5 million acres would be guaranteed to them. They received nothing — not the land, not an official rejection, not even the acknowledgment that the treaties existed. This state of legal limbo persisted for more than half a century until the documents were finally unsealed in 1905.
The La Posta Reservation encompasses 3,556 acres in the mountains of eastern San Diego County, near the Mexican border. Approximately sixty people live on the reservation. The La Posta Band belongs to the Kumeyaay people — specifically the Tiipai, the southern division of the Kumeyaay — whose territory once covered a large portion of San Diego County and extended into northern Baja California.
The Tiipai language, one of the Yuman language family, was spoken throughout this territory. Like many Indigenous languages in California, Tiipai has faced significant pressure over the generations since contact, and the number of fluent speakers has declined sharply. Tribal language revitalization efforts represent one of the ways the La Posta Band, like other Kumeyaay communities, works to maintain cultural continuity alongside governmental continuity.
The La Posta Band organized under an Indian Reorganization Act constitution on March 5, 1973 — more than a century after the unratified treaties had promised something different. The IRA, passed in 1934, reversed the Dawes Act allotment policy that had broken up tribal land holdings and ended the forced conversion of tribal governments into whatever form the federal government found convenient.
Tribal governance on 3,556 acres with a small enrolled population requires the same elements as governance anywhere: decision-making structures, resource management, relationships with federal and state agencies, maintenance of services for community members. The La Posta Band does this work in a location that is remote from the economic centers of San Diego County, on land that the federal government set aside partly because settlers had not yet found it useful enough to take.
In 2025, the La Posta Band opened a cannabis dispensary on the reservation — a decision that reflects the economic toolkit available to tribal governments exercising sovereign rights within their territory. Cannabis operations on tribal lands exist in a complex legal space, but for small reservations with limited economic options, they represent one of the more viable paths to revenue generation that doesn't depend on geography, tourism, or infrastructure that the reservation lacks.
The dispensary is the most recent development in a long history of adaptation — a community that survived the unratified treaties, survived the allotment era, survived the decades when federal policy explicitly aimed at terminating tribal governments, and has continued to exercise sovereignty over land that may be 3,556 acres but is land nonetheless. The mountains around La Posta are the mountains the Tiipai have known for thousands of years. The boundary of the reservation is a recent imposition on that knowledge.
The La Posta Reservation is located at approximately 32.734°N, 116.391°W in eastern San Diego County near the US-Mexico border. The reservation is in the mountain terrain south of the Laguna Mountains and northeast of Jacumba. Nearest airports: KSAN (San Diego International, ~45 nm W), KSEE (Gillespie Field, ~35 nm NW), L78 (Jacumba, ~8 nm S).