The incident occurred on Monday morning when the boy was on a hike in the thermal area of the park in the vicinity of the Lone Star Geyser near Old Faithful when his foot broke through the thin crust and he suffered significant thermal burns to his foot and ankle, according to a statement from the National Park Service.

It was the first known thermal injury in the park this year. Officials urged visitors to stay on designated boardwalks and trails in thermal areas.

A 17-year-old hiker has suffered significant burns while walking in a thermal area of Yellowstone National Park. According to a news release by the National Park Service, the unidentified male hiker was in the vicinity of Lone Star Geyser near Old Faithful on the morning of Monday, July 28, when the incident occurred.