Le Marche extends over an area of 9,694 km?? of the central Adriatic slope between Emilia-Romagna to the north, Tuscany and Umbria to the west, and Lazio and Abruzzo to the south, the entire eastern boundary being formed by the Adriatic. Most of the region is mountainous or hilly, the main features being the Apennine chain along the internal boundary and an extensive system of hills descending towards the Adriatic. With the sole exception of Monte Vettore, 2,476 m high, the mountains do not exceed 2,400 m. The hilly area covers two-thirds of the region and is interrupted by wide gullies with numerous ?? albeit short ?? rivers and by alluvial plains perpendicular to the principal chain. The parallel mountain chains contain deep river gorges, the best known being those of the Furlo, the Rossa and the Frasassi.
The coastal area is 173 km long and is relatively flat and straight except for the hilly area between Gabicce and Pesaro in the north, and the eastern slopes of Monte Conero near Ancona.