A federal judge had denied an injunction sought by wildlife advocates to block the slaughter of Yellowstone bison.
Thursday's order from U.S. Judge Charles Lovell comes after Montana Gov. Brian Schweitzer stepped in last month to halt the impending shipment of hundreds of the animals to slaughter.
Citing Schweitzer's 90-day prohibition against those shipments, Lovell wrote that there was no emergency that would necessitate court intervention.
Many bison are infected with the disease brucellosis.
Park officials have yet to say what they will do with more than 200 diseased bison captured this winter. Almost 4,000 of the animals have been killed over the last decade to prevent infections in livestock outside the park.
The Western Watersheds Project, Buffalo Field Campaign and other groups have sued to stop the practice.