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2w ago

Bison Dies After Falling Into Yellowstone’s Grand Prismatic Spring

Park rangers are overseeing the bison’s natural decay in the scalding spring to prevent scavengers from risking visitor safety

A bison walked through the Prismatic Hot Spring at Yellowstone National Park and fell in, the National Park Service said. "An unfortunate example of what can happen by wandering off boardwalk in thermal areas," the National Park Service said.
Yellowstone National Park Bison
A large bison dying in a Yellowstone National Park hot spring, on June 21, 2025.
Image

Overview

  • On June 21 a mature bison wandered off a boardwalk in Yellowstone’s Wyoming section and slipped into the Grand Prismatic Spring, where it succumbed to near-boiling water.
  • The Grand Prismatic Spring reaches surface temperatures of about 192 °F, making survival impossible for animals that break through its fragile crust.
  • As of June 26 rangers have left the carcass to decompose naturally under watch to deter scavenging wildlife from approaching the busy tourist site.
  • Scientists say that although wildlife can sense rising temperatures near thermal features, animals still misjudge the spring’s crust and occasionally fall victim to its hidden dangers.
  • The incident highlights the critical need for visitors to stay on designated trails and boardwalks around Yellowstone’s geothermal areas to avoid serious injury or death.