Yes, there are rock glaciers in the US. They are found primarily in the western mountainous regions, including:

* The Rocky Mountains: Colorado, Wyoming, Montana, Idaho, and Utah have numerous rock glaciers.

* The Sierra Nevada: California has several rock glaciers, particularly in the high elevations.

* The Cascade Range: Washington and Oregon also have rock glaciers, often in the higher volcanic areas.

* Alaska: Given its mountainous terrain and high latitude, Alaska has a significant number of rock glaciers.

While not as common as in some other parts of the world, rock glaciers are a notable feature in these US mountain ranges, playing a role in the local ecosystems and reflecting past and present glacial activity.