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Fishing Restrictions Lifted in Wyoming's Mammoth Hot Springs

9/10/2025

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Summary

Story summary

The National Park Service has lifted fishing restrictions on select rivers and streams in Mammoth Hot Springs, Wyoming.
This decision follows a previous closure due to warm water temperatures and low flows affecting trout populations.
Cooling temperatures, recent rain, and forecasts for additional precipitation contributed to this change.
Open rivers now include the Madison, Firehole, and Gibbon Rivers downstream of Norris Campground.
Yellowstone Lake and other lakes remain open for fishing from sunrise to sunset under the 2025 Fishing Regulations.

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Story summary

The National Park Service has lifted fishing restrictions on select rivers and streams in Mammoth Hot Springs, Wyoming.
This decision follows a previous closure due to warm water temperatures and low flows affecting trout populations.
Cooling temperatures, recent rain, and forecasts for additional precipitation contributed to this change.
Open rivers now include the Madison, Firehole, and Gibbon Rivers downstream of Norris Campground.
Yellowstone Lake and other lakes remain open for fishing from sunrise to sunset under the 2025 Fishing Regulations.