Piedmont Geography

Piedmont is a basin. Mountains ring it to the west, north and south, the land falls inward to the Po, and the three landscapes that result — alps, hills, plain — sit in clear bands.

The mountains

The Cottian, Graian and Pennine Alps form the French and Swiss borders. Monviso (3,841 m), a near-perfect pyramid visible from much of the plain, is the source of the Po. The Gran Paradiso massif is shared with Aosta Valley, and Monte Rosa straddles the Swiss frontier. To the south the Ligurian Alps and the Maritime Alps separate Piedmont from the sea — close enough that the coast is an hour and a half away, but a genuine barrier.

The hills

Between mountain and plain lies the belt that gives the region its reputation. The Langhe, Roero and Monferrato are marine sediments lifted and eroded into steep, narrow ridges — the reason the vineyards are terraced and the villages sit on crests. Aspect matters enormously here: a slope facing south-west ripens Nebbiolo, one facing north does not, and the denomination boundaries follow that logic closely. UNESCO inscribed the landscape in 2014.

The plain

The eastern lowland around Vercelli and Novara is the largest rice-growing area in Europe, irrigated by a canal network drawing Alpine water — the Cavour Canal, cut in the 1860s, is the backbone. Flooded from spring, it is one of the few Italian landscapes that is genuinely flat to the horizon.

Water and lakes

The Po gathers the Dora Riparia, Dora Baltea, Sesia, Tanaro and Ticino as it crosses the region. In the north-east, Lake Maggiore's western shore is Piedmontese, as is the small, deep Lake Orta.

Consequences

The enclosing mountains that make Piedmont fertile also trap its air, and Turin shares the Po valley's winter pollution problem. The same ring keeps the region drier than its rainfall suggests, and makes irrigation, not rain, the basis of the plain's agriculture.