Along the road to Inspiration Point there is a house-sized granite boulder sitting in the pine forest alongside the road. It was plucked from the Beartooth Mountains by an early Pinedale Glacier and dropped on the north rim of the Grand Canyon of the Yellowstone nearly 80,000 years ago. Continued glacial advances and retreats led to the present-day appearance of the canyon and surrounding area.

Grand Canyon of the Yellowstone Tour
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