The answer to 'why is my carpenter ant trails' is that carpenter ants are leaving visible trails as they forage for food and water. Carpenter ants are attracted to damp, decaying wood where they build their nests. The trails they leave behind are a sign of an active infestation, as they travel between their nest and food sources.
Carpenter ant trails are typically found along baseboards, around door and window frames, or along tree branches or utility lines leading to the nest. The trails are made up of thousands of individual ants following the same path, creating a distinct line. Seeing these trails is an important early warning sign that you may have a carpenter ant problem that needs to be addressed.