The lawsuit is the latest escalation in a decades-long fight between state and federal officials over how to manage the park's growing bison population.

A long-simmering battle between Yellowstone National Park officials and the Gianforte administration in Montana came to a head on Tuesday with state officials suing the park in federal court for its bison management plan.

Montana alleged the Yellowstone National Park bison herd population has grown to a potential harmful level.

Montana officials, saying they've not been given "a fair shake," filed a New Year's Eve lawsuit over Yellowstone National Park's bison management plan.

Department of Livestock and FWP join Gov. Gianforte in suing the park over its plan to increase the park’s bison population and increase tolerance for bison presence outside of park boundaries.

Governor Greg Gianforte and two state agencies have filed a lawsuit against the National Park Service and its bison management plan at Yellowstone National Park. Gianforte is issu

Montana state officials are suing National Park over its bison management plan. The case argues that park officials have intentionally cut Montana out of management plans or ignored the park’s science in an effort to boost park bison numbers and avoid vaccinating them against brucel-losis.