The Ohře (equally commonly known in English by its German name Eger, hence the name of the trough) flows through the Eger Graben and separates the Ore Mountains from the Slavkovský les and the Doupov Mountains. The trench continues to the northeast along the valley of the Bílina and later, as the North Bohemian Basin, separates the Ore Mountains from the Bohemian Central Mountains, where the River Ohře leaves the graben and flows into the Elbe south of the Bohemian Mountains.