Romanesque bridge of Isaba – Col de la Pierre Saint-Martin loop from Uztárroz / Uztarroze

Romanesque bridge of Isaba – Col de la Pierre Saint-Martin loop from Uztárroz / Uztarroze

Hard

4.7

(10)

259

riders

Romanesque bridge of Isaba – Col de la Pierre Saint-Martin loop from Uztárroz / Uztarroze

03:17

61.0km

1,230m

Road cycling

Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride. The starting point of the route is accessible with public transport.

Last updated: November 3, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

Larrako erreserba naturala

Waypoints

Start point

Bus stop

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5.67 km

Romanesque bridge of Isaba

Highlight • Bridge

Over the Belagua riverbed lies this ancient Roman-era bridge with its characteristic arched shape, a true postcard. A new bridge has been built next to it, and this one has fallen into disuse.

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15.9 km

View of the Belagua Valley

Highlight • Viewpoint

At the bottom of the Roncal valley, right where the climb to Puerto de la Piedra de San Martín begins, you will find this beautiful bend in the mountain called …

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20.7 km

View of the Roncal Valley from Cuartel de los Yeguaceros

Highlight • Viewpoint

Going up to the Puerto de la Piedra de San Martín through the Roncal - Belagua valley, after the first 5 km of hard climb with a section of continuous …

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21.0 km

Col de la Pierre Saint-Martin

Highlight • Mountain Pass

21.4 km

View of the Solitary Mountains

Highlight • Viewpoint

24.5 km

Erraitzeko Lepua

Mountain Pass

25.4 km

Larra-Belagua

Highlight • Climb

Larra-Belagua is a protected natural area located in the Roncal valley, 1,026 meters above sea level. It is one of the wildest and most unique landscapes in Navarra.

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30.3 km

Col de la Pierre Saint-Martin

Highlight • Mountain Pass

Different port. It combines high mountain green meadows with stony areas. A very photogenic 360 degree curve.

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30.5 km

Ascent to Col de la Pierre Saint-Martin from Isaba

Highlight (Segment) • Mountain Pass

Up to kilometer 12, the climb is gentle. From there, it becomes more difficult, and you'll face some slopes with a 10% gradient. The total climb is 26 kilometers, and …

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