Pit run is a term often used in construction and landscaping to describe a type of aggregate material. It typically refers to a mixture of gravel, sand, and dirt that has been naturally excavated from a pit or quarry. There are a variety of synonyms that can be used to describe similar types of materials, including fill, screenings, crushed stone, and base course. Each of these terms refers to a different type of aggregate material with varying levels of coarseness and composition. Choosing the right type of material for a project depends on a range of factors, including its intended use and the specific requirements of the job site.