Fisgas de Ermelo

Fisgas de Ermelo is one of the largest waterfalls on the Iberian Peninsula, set in Alvão Natural Park in the municipality of Mondim de Basto, northern Portugal. The Olo River tumbles over successive rocky ledges, with main drops of about 60 metres. Many describe it as the biggest waterfall in the country.

Where is Fisgas de Ermelo?

The falls lie deep in Alvão Natural Park, on the border between the municipalities of Mondim de Basto and Vila Real. The surroundings are mountain scenery of deep valleys, rock and streams, a quiet alternative to the better-known routes of the Douro and Trás-os-Montes regions.

What does the waterfall look like?

The Olo does not fall in a single vertical stream. The water descends over several levels and rock shelves, creating a long, very photogenic view. Near the base of the drops are natural pools, locally called piocas, where people swim in summer.

When should you go?

The falls are most impressive in spring and after heavy rain, when the flow is strongest. In summer there is less water, but the natural pools become the main attraction. Check the forecast before setting out, since mountain weather changes fast and rocks near water can be slippery.

How to visit

The PR3 – Fisgas do Ermelo trail leads to the falls: a demanding circular hike of about 12.4 km with many viewpoints. It suits fit walkers who bring water, sturdy shoes and a full day. For those who prefer not to do the long route, a new viewpoint opened on 19 April 2026, offering safer and better-organised views of the cascades in response to growing visitor interest. An interpretive centre dedicated to Fisgas de Ermelo has also operated since 2024, helping visitors understand the nature and character of the place.

Frequently asked questions

Is Fisgas de Ermelo the biggest waterfall in Portugal? Portuguese media describe it as the largest in the country and one of the largest on the Iberian Peninsula.

How tall is it? The main drops are about 60 metres, spread across several levels.

Can you swim here? There are natural pools, the piocas, popular on hot days. Be careful when the water is high.

Which trail leads to the falls? The PR3 – Fisgas do Ermelo trail, a circular route of about 12.4 km that requires good fitness.

When is the best time to visit? Spring or after heavy rain, when the water flows strongest.

Practical tips

Start with plenty of daylight, and bring water, snacks and footwear with good grip. Rocks beside the cascades are easy to slip on, so stay on marked paths and viewpoints. If you combine the visit with exploring Mondim de Basto, allow at least half a day for the falls, or a full day for the whole PR3 loop. Respect the park: take your litter home and keep to marked trails. Photographers will appreciate soft morning light and the full spring flow, which gives the cascades their greatest drama.