Yellowstone Revises Bison Plan Amid Changing Migrations
Published Date: 4/29/2026
Notice
Summary
Yellowstone National Park is updating its plan to manage bison because their migration patterns have changed and the old plan doesn’t fit anymore. This update will look at new ways to keep bison healthy, protect people and property, and respect tribal rights. Everyone can share their thoughts by May 29, 2026, as the park works on this important and careful review.
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Analyzed Economic Effects
3 provisions identified: 3 benefits, 0 costs, 0 mixed.
Yellowstone bison plan update
The National Park Service will prepare a Supplemental Environmental Impact Statement (SEIS) to update the Yellowstone National Park Bison Management Plan Final EIS (2024). The SEIS will develop one or more new alternatives to respond to less predictable seasonal bison migration and reconsider management assumptions for Yellowstone (WY, MT, ID).
Analysis of brucellosis transmission
The SEIS will provide additional analysis on addressing brucellosis transmission between bison and livestock as part of bison management options. That analysis will be incorporated into new alternative(s) and will inform foreseeable effects of proposed actions in the Yellowstone region (WY, MT, ID).
Tribal trust responsibilities considered
The SEIS will include consideration of tribal trust responsibilities as part of updating the bison management plan. The NPS says it will work to fulfill tribal trust responsibilities while developing new alternatives.
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