Where were the trenches on the western front?

Trenches were all along the front lines stretched across huge portions of Europe during World War 1.

The most famous trench lines started along the North Sea coast near Nieuwpoort, Belgium, ran south past Somme and Champagne through France, than east to Verdun. It then ran in a rough curve south again through France.

The main trench system ends at it's southern most point halfway down the eastern French border in Alsace, at the Swiss border.

Plans to continue the trench system into southern France were never completed.