MTB route no. 13 - Lanildut / Lanrivoaré / Tréouergat

Lanildut Lanildut
  • Distance 59 Km
  • Difficulty Medium
  • Loop
Hermitage Saint Hervé
Hermitage Saint-Hervé
Saint Ergat fountain
Château de Kergroadez
Château de Kergroadez

About us

On this 59 km circuit, take advantage of discovery breaks and a variety of viewpoints.

Official route no. 13 takes you on a tour of emblematic Pays d'Iroise landmarks such as the port of Lanildut, Kergroadez castle, Saint-Hervé hermitage and Rumorvan.

Mountain biking is a great way to discover sites that mark the history of our Pays d'Iroise! Set off on an adventure on our signposted circuits, which will take you through many of our region's communes.
18 mountain bike circuits guide you through the Pays d'Iroise countryside or along the coast.

Along the way, take the time to put your foot down and read the heritage interpretation panels.

A few rules of safety and good behavior:
- The coastal path is forbidden to ATVs
- Before setting off, check the condition of your ATV and take a repair kit
- Respect the highway code: ride in single file, wear a helmet: it is compulsory for children under 12 (CSIR of 02/10/15).
- Always take a snack and a drink with you
- Respect private property
- Don't litter, respect nature by using the garbage cans.

The mountain bike topoguide is available from the Iroise Bretagne tourist office for €5.

See the bottom of the page for all the activities and restaurants in the area.

Documents to download
Step 1/6:

Cemetery parking lot, behind the Brélès church.

Brélès, once a trêve of the parish of Plourin-Ploudalmézeau, became an autonomous parish in 1802, following the Concordat signed between Napoleon and the Pope the previous year. Its church, once a simple chapel, is one of the few in the Pays d'Iroise to have retained its enclosure. A monument in the shape of a triumphal arch marks the entrance.

Patrimoine Iroise


This street is lined with the houses of the barge masters, all hidden behind their high walls. Most of these beautiful 17th and 18th century homes are topped by half-moon-shaped chimneys known as "English chimneys".


Situated in the northern part of the Chenal du Four, this small Aber is an excellent stopover for yachtsmen on their way to southern Brittany or England. It's also a great base for day trips to Ouessant or the Molène archipelago on a semi-rigid
The port of Aber Ildut is very lively, with seaweed harvesters arriving to drop off seaweed harvested in the Iroise Sea, pleasure boats mooring, and fishing trips by kayak or stand-up paddle... Kayaks and bicycles for hire from the port store.

The port of Lanildut has long since become the biggest seaweed unloading port on the mainland, with 40,000 to 45,000 tonnes of seaweed passing through every year, keeping the famous seaweed harvesters in business. To find out more, visit the Maison de l'Algue, where you can learn all about the history and development of this typical coastal activity.

Port of Lanildut

Built by the Marquis François III de Kergroadez near Brest, this early 17th-century château is a classic example of Breton Renaissance and defensive architecture. This vast Leonardo residence is built entirely of Lanildut granite, around a square courtyard enclosed by a defensive wall.

Take advantage of the guided tour (in season) to immerse yourself in another era, discovering, room by room, the way of life in the 17th century through the furniture and accessories on display.

Château de Kergroadez

Classified as a historic monument on July 1, 1975, the hermitage of Saint-Hervé houses the ruins of a chapel, a miraculous fountain and a stone cell that is said to have housed the saint.

Hermitage Saint-Hervé

Located at the bottom of the Traon Bouzar, the Vallon Sourd, the Saint-Ergat fountain is a natural spring that has always been frequented by hundreds of pilgrims suffering from rheumatism. The three columns, reused Gallic stelae, bear witness to an ancient cult at this site, later linked to Sant Ergad when he became the patron saint of the Tréouergat parish.

St-Ergat fountain
Getting there with Google Maps