Rock glaciers in Utah's Wasatch, Uinta, and La Sal mountain ranges may contain approximately 1 billion tons of hidden ice [1].

This discovery suggests that significant water storage exists in the region that remains invisible to conventional glacier surveys. Because these deposits are shielded by layers of debris, they may behave differently than exposed glaciers during seasonal melts.

Rock glaciers consist of piles of rock and debris that conceal large masses of ice [2]. These formations are located across the Wasatch and Uinta ranges, as well as the La Sal Mountains on the Colorado Plateau near Moab [3].

Researchers found that the ice is buried beneath loose rocks or rubble, creating a deceptive surface. This layering protects the ice from immediate exposure to the air, allowing it to persist in environments where surface ice would otherwise vanish.

"There's a lot of ice that's hidden in Utah's mountains," Anderson said. "When we are high in the mountains and walking across loose rocks or rubble, you don't realize there could be 120 feet of ice buried beneath your feet" [4].

The potential depth of this buried ice reaches up to 120 feet [4]. This volume represents a substantial reservoir of frozen water that has not been fully accounted for in previous regional assessments.

Unlike traditional glaciers, which are primarily composed of ice and snow, rock glaciers are characterized by their high concentration of debris. This structural difference means the ice is insulated, which may slow the rate of melting compared to open-air ice sheets.

“Rock glaciers in Utah's Wasatch, Uinta, and La Sal mountain ranges may contain approximately 1 billion tons of hidden ice.”

The presence of billion-ton ice reserves beneath rock debris indicates that the Western US may have more natural water storage than previously mapped. As climate patterns shift, understanding the volume and stability of these 'hidden' glaciers is critical for predicting long-term water availability and runoff for the surrounding ecosystems and human populations.