The Petersburg Borough's boundaries will stand as they are, now that Juneau has lost its last legal challenge on the matter.
The Alaska Supreme Court issued a decision Friday, upholding a lower court's decision and the state Local Boundary Commission's 2012 decision to grant Petersburg a huge boundary expansion.
It puts to bed a dispute over about 1,500 square miles of Southeast both boroughs laid claim to.
The previously contested land is almost completely uninhabited national forest - an old estimate puts the population at one - but with the land goes potential federal receipts, some property and sales tax revenue, and local authority.
"I don't necessarily consider it a loss," Amy Mead, the City & Borough of Juneau's attorney, said. "We thought the law stood for something that needed clarification, and the court has now clarified."
The Supreme Court heard the case in June.