The U-shaped glacial Zêzere valley near Manteigas with steep green slopes of the Serra da Estrela
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Manteigas

"Manteigas sits at the bottom of a valley a glacier carved, and you can feel that scale the second you look up."

A wool-mill town tucked into the deepest, most dramatically glacial valley of the Serra da Estrela, where the Zêzere river carves a U-shaped trench straight through Portugal's highest mountains.

Manteigas sits so deep inside the Serra da Estrela that the drive in feels like descending into a bowl — hairpin turns dropping through pine forest until the town appears below, tucked along the Zêzere river with mountain walls rising steeply on both sides. It’s the lowest point in the highest range in mainland Portugal, and that contradiction is the whole character of the place: a warm, sheltered little town surrounded by some of the country’s harshest terrain.

Wool, Water, and Ice Age Geometry

Manteigas grew up on wool. The Serra da Estrela’s cold winters made it prime sheep country for centuries, and several old lanifícios — wool mills — still stand along the river, some now converted into small museums or guesthouses, their heavy machinery preserved as a record of the industry that funded this valley before tourism did. I toured one, all iron looms and carding machines gone quiet, and the guide, whose family had worked wool for three generations, explained how the mills used the fast Zêzere current for power long before electricity reached this remote corner of Portugal. But the real geological headline here is the valley itself: the Vale Glaciar do Zêzere, a textbook U-shaped valley gouged out by a glacier during the last ice age, one of the very few clearly glacial landscapes in mainland Portugal, its steep symmetrical walls unmistakable once you know to look for the shape.

Old stone wool mill building along the Zêzere river in Manteigas with mountain slopes behind

I hiked a stretch of the glacial valley trail from Vale do Rossim toward the Nave de Santo António, granite boulders scattered across alpine meadows like something dropped from a great height, which, geologically, is more or less exactly what happened. Sheep grazed unbothered by hikers, and at higher points I could see the whole U shape laid out below, unmistakably carved rather than eroded.

A Slower Kind of Mountain Town

Back in Manteigas itself, evenings are quiet — a handful of restaurants serving Serra da Estrela cheese so soft you eat it with a spoon, cured meats, and trout pulled straight from the cold river running through town.

Alpine meadow scattered with granite boulders along the glacial Zêzere valley trail above Manteigas

When to go: Early autumn, after the summer hiking crowds thin out but before winter snow closes the high mountain roads, when the valley’s colors turn and the cheese is at its richest from the last of the summer grazing.