More California Tribes Join Fight Against Scotts Valley Vallejo Casino Project as Federal Court Battle Intensifies
VALLEJO, Calif. - Sept. 11, 2026 - Opposition to the Scotts Valley Band of Pomo Indians' proposed Vallejo casino continues to grow as two Northern California tribes have formally entered the federal court battle, urging a judge to reject the tribe's effort to overturn a recent U.S. Department of the Interior decision that blocked the project.
The Yocha Dehe Wintun Nation and Kletsel Dehe Wintun Nation have filed an amicus brief supporting the federal government's position in Scotts Valley Band of Pomo Indians v. Burgum, a lawsuit challenging the Department of the Interior's 2026 Indian Lands Opinion. That opinion determined that the Indian Gaming Regulatory Act does not permit gaming on the proposed Vallejo site because Scotts Valley failed to demonstrate the necessary historical connection to the property.
The latest filing adds to a growing coalition opposing the project. According to the tribes, the Governor of California, Lytton Rancheria and the United Auburn Indian Community have also filed briefs backing the federal government's decision and urging the court to deny Scotts Valley's request for an injunction.
$3,000 Casino Welcome Bonus!Timeline: Key Events in the Vallejo Casino Dispute
- 2025: Federal officials issue a favorable determination supporting the Scotts Valley Band of Pomo Indians' effort to pursue gaming on the proposed Vallejo casino site.
- 2025-2026: Multiple California tribes challenge the determination, arguing that Scotts Valley lacks the historical connection required under the Indian Gaming Regulatory Act for gaming at the Vallejo location.
- 2026: The U.S. Department of the Interior revisits the matter after reviewing additional evidence submitted by opposing tribes and other stakeholders.
- 2026: The Department issues a new Indian Lands Opinion reversing the earlier determination, concluding that Scotts Valley failed to demonstrate a sufficient historical connection to the Vallejo site.
- 2026: Scotts Valley files suit in federal court, challenging the Interior Department's reversal in Scotts Valley Band of Pomo Indians v. Burgum.
- 2026: The tribe seeks a preliminary injunction that would suspend the effects of the Department's adverse determination while litigation proceeds.
- September 2026: California Gov. Gavin Newsom's administration, Lytton Rancheria and the United Auburn Indian Community file briefs supporting the federal government's position.
- Sept. 8, 2026: The Yocha Dehe Wintun Nation and Kletsel Dehe Wintun Nation file an amicus brief urging the court to deny Scotts Valley's injunction request and uphold the Department's decision blocking gaming eligibility for the Vallejo project.
Growing Opposition Could Weigh on Casino Project
While amicus briefs do not determine the outcome of litigation, the filing underscores the increasingly broad opposition facing the proposed Vallejo development.
The two Patwin tribes argue that the Department of the Interior properly reconsidered evidence that had been excluded from an earlier 2025 determination favorable to Scotts Valley. After reviewing that evidence, federal officials concluded the tribe had not established a significant historical connection to the Vallejo site, a key requirement under federal gaming law.
The tribes contend the revised 2026 opinion corrected legal errors contained in the earlier decision and appropriately reconsidered information submitted by affected tribes and other stakeholders.
Key Legal Question Centers on Historical Connection
At the heart of the dispute is whether Scotts Valley can legally conduct gaming activities on land located far from its traditional homeland.
The Department of the Interior's latest opinion concluded that the tribe failed to satisfy Indian Gaming Regulatory Act standards requiring a sufficient historical connection to the proposed gaming site. Scotts Valley disputes that conclusion and is seeking judicial intervention to preserve its ability to move forward with the Vallejo casino project while litigation proceeds.
The tribal amici argue that the historical evidence reviewed by federal officials undermines the foundation of the earlier favorable determination.
Injunction Request Seen as Critical Near-Term Battle
The immediate legal fight centers on Scotts Valley's request for an injunction that would effectively suspend the impact of the Interior Department's adverse determination during the court challenge.
In their filing, the tribes argue that Scotts Valley was repeatedly warned that the earlier approval remained vulnerable to review and should not have relied upon it as final. The brief notes that project-related development occurred despite ongoing legal and administrative uncertainty surrounding the federal determination.
A denial of the injunction would leave the Department's 2026 decision in place while the lawsuit moves forward, potentially slowing momentum for the proposed casino development.
Potential Implications Beyond Vallejo
The case is being closely watched throughout Indian Country because it could help define how federal regulators evaluate off-reservation gaming proposals and historical land connections in future cases.
A ruling upholding the Department of the Interior's reversal could reinforce federal authority to revisit prior gaming-related determinations when new evidence emerges and could influence future disputes involving competing tribal claims to proposed casino sites.
For now, the latest filing signals that opposition to the Vallejo project continues to broaden as the federal court considers the next phase of a case that may have ramifications extending well beyond a single casino proposal.
