Scree

Scree, also called talus, refers to an accumulation of broken rock fragments at the base of crags, mountain cliffs, or valley shoulders. Landforms associated with these materials are sometimes called scree slopes or talus piles. The terms scree and talus are often used interchangeably, though scree commonly refers to smaller material like mixed gravel and loose dirt, talus to rocks larger than scree.

The Buffalo Mountain Trail in Summit County Colorado is known for its massive scree fields.