Yellowstone National Park staff say that extreme heat from surrounding thermal areas has caused thick oil to bubble to the surface.
It damaged the blacktop and created unsafe driving conditions on the popular road off of the Grand Loop Road halfway between Old Faithful and Madison Junction in the park’s Lower Geyser Basin.
The 3.3-mile loop drive takes visitors past Great Fountain Geyser, White Dome Geyser, and Firehole Lake.
The road will remain closed for the next several days while maintenance crews make repairs.
The date for reopening the road will be determined after crews assess the situation.