The U.S. Supreme Court on Monday refused to hear Utah’s challenge against public lands, striking a major blow to the state’s effort to wrest control of millions of acres of land from the federal government.

The state in August filed a lawsuit asking the court to declare the federal Bureau of Land Management’s ownership of 18.5 million acres of land in Utah unconstitutional, with potential ramifications for public lands across the country.

The filing, which state leaders said was the result of “decades of legal analysis,” targeted BLM land “unappropriated” to parks, monuments or other national sites.

Utah argued the BLM’s ownership and oversight of that land harms the state’s sovereignty and that the federal government should start to “dispose of these lands.”

“We’re grateful the Supreme Court swiftly rejected the State of Utah’s misguided land grab lawsuit,” Steve Bloch, legal director for the environmental nonprofit Southern Utah Wilderness Alliance, said in a statement. “For more than 100 years, the Supreme Court has affirmed the power of the federal government to hold and manage public lands on behalf of all Americans.”

The state has paid Clement & Murphy, PLLC, a law firm based in Virginia, over $500,000 since 2023 to litigate the case.

Utah has also budgeted over $2.6 million for a public relations campaign to raise “awareness” that the BLM’s policies for public land in the West “are harming Utahns by restricting access to public lands, hindering active management, and reducing economic and recreation opportunities.”

The Southern Utah Wilderness Alliance in December sued the Utah governor and attorney general for bringing this case to the Supreme Court.

The group wants the state 3rd District Court to bar Utah from questioning the constitutionality of “unappropriated” public lands in any court.