Based on tips from the public and social media, authorities conducted more investigations concerning the group and issued violation notices from Zion and Mesa Verde national parks and Corona Arch.

In a July 13 Facebook post, the group addressed the controversy that followed the Yellowstone incident.

“We want you all to know, we take full responsibility for our actions, and will pay restitution for our poor decisions in the states ...,” the group said. “During the past 6 weeks, we’ve had time to reflect on our actions and understand that what we did was wrong and cannot happen again.”

Grand Prismatic Spring is Yellowstone’s largest hot spring, measuring about 370 feet in diameter, according to the park’s website. Its bright colors make it one of Yellowstone’s biggest tourist draws.

Walking on the colorful bacterial mats that surround the thermal features can damage the microscopic communities and leave behind footprints, according to the park. Fragile crust surrounds hot springs such as the Grand Prismatic Spring, and falling in can cause fatal burns.

In June, a tourist died when he fell into a hot spring at the Norris Geyser Basin.

Follow Managing Editor Joshua Wolfson on Twitter @joshwolfson

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