Two lawsuits seek to overturn BLM bison grazing cancellations

By Ian M. Stevenson | 08/05/2026 04:07 PM EDT

American Prairie, which grazes bison on BLM allotments, has until Sept. 30 to remove its herd from federal lands.

A herd of bison move through land controlled by the American Prairie reserve south of Malta, Montana.

A herd of bison move through land controlled by the American Prairie reserve south of Malta, Montana, on April 25, 2012. Matt Brown/AP

Conservation groups are pushing in court to block a Trump administration move to evict bison from federal grazing land in Montana.

Two lawsuits filed this week in federal court in Montana ask judges to stop the decision to remove bison grazed for conservation benefits from the Bureau of Land Management land.

American Prairie, the Montana conservation group that has a herd of close to 1,000 bison, sued the administration Tuesday. Western Watersheds Project, represented by the Western Environmental Law Center, sued Wednesday.

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A spokesperson for BLM, an Interior Department agency, did not immediately respond to a request for comment. The agency has argued that the Taylor Grazing Act, the 1934 law that governs public land grazing, only applies to livestock kept for “sale or trade,” which it has said does not apply to the bison.