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Tourists caught walking on Yellowstone hot spring's deadly crust

Grand Prismatic Spring is Yellowstone's largest hot spring, according to the park.
Grand Prismatic Spring is one of the most popular features at Yellowstone National Park.

Video shared on social media shows tourists walking on the fragile crust of Yellowstone National Park’s largest hot spring.

Visitors are supposed to stick to designated walkways around thermal features at Yellowstone National Park

It’s not just for their own safety or the protection of the park’s famed, fragile resources. It’s also the law.  

That didn’t seem to stop two recent tourists at Yellowstone’s largest hot spring. 

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Tanya Saueressig of Livingston, Montana, was about the leave Grand Prismatic Spring, when she saw them in the distance, walking on the iconic spring's colorful bacterial mats, and captured it on video.

"I did this double take like, this can't be real ... yep that's actually people out there," she told USA TODAY. "And then I started getting scared for them because people have fallen into the thermal features."

Yellowstone National Park dangers

Yellowstone National Park did not comment on the specific incident but told USA TODAY by email:

Burns from thermal features are a common cause of serious injury and death in the park. The ground surrounding these features may look solid, but it can be just a thin crust with super-heated water below. Water in hot springs can cause severe or fatal burns, and scalding water underlies most of the thin, breakable crust around hot springs.

Last year, a bison died after falling through the crust at Grand Prismatic Spring. 

Tourists caught walking on Yellowstone hot spring's deadly crust
Visitors view Grand Prismatic Spring from the park's walkway on July 23, 2025.

Saueressig thought about that bison and worried, "I'm gonna watch somebody die today ... I just was so afraid for them, like, oh, they don't even realize what they're doing," she said. "They don't realize it's not solid ground. There's boiling hot water centimeters under your feet."

Over the years, more than 20 people have died due to scalding at the park straddling Idaho, Montana and Wyoming, according to Yellowstone Volcano Observatory, which notes that hot springs-related injuries and deaths far eclipse wildlife-related incidents at Yellowstone.  

The park’s website warns visitors that “Yellowstone is a dangerous place” and that visitors are responsible for their own safety, but those who break park rules can face punishment. 

In 2024, a visitor from Washington state was sentenced to seven days in jail for thermal trespassing at Steamboat Geyser in the Norris Geyser Basin. Others have been similarly sentenced

Yellowstone safety tips

Tourists caught walking on Yellowstone hot spring's deadly crust
Signs throughout Yellowstone National Park warn visitors of danger and remind them to stay on designated trails around the park's famed hydrothermal features.

Signs throughout the park remind visitors of rules. 

Yellowstone also shared the following safety tips:  

  • Always walk on boardwalks and designated trails. Keep children close and do not let them run on boardwalks. 
  • Do not touch thermal features or runoff. 
  • Swimming or soaking in hot springs is prohibited.  
  • Pets are prohibited in thermal areas. 
  • Do not throw objects into hot springs or other hydrothermal features. 
  • Toxic gases may accumulate to dangerous levels in some hydrothermal areas. If you begin to feel sick while exploring one of our geyser basins, leave the area immediately. 

(This story has been updated with new information.)

This article originally appeared on USA TODAY: Tourists caught walking on Yellowstone hot spring's deadly crust

Read full story on USA TODAY

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