Dan McGrath, Colorado State University; Ashlesha Khatiwada, Colorado State University, and Scott Hotaling, Utah State University Fri, July 10, 2026 at 1:47 p.m. UTC 5 min read Add Yahoo as a preferred source to see more of our stories on Google. If you have ever hiked in the high peaks of Colorado, the Wasatch Range in Utah or the Tetons in Wyoming, you've almost certainly seen a rock glacier, perhaps without even knowing it.