4.2
(604)
3,719
hikers
166
hikes
Hiking around Le Tréhou offers exploration of a rural commune in Finistère, Brittany, situated at the foot of the Monts d'Arrée. This region is characterized by varied vegetation, high moors, coniferous forests, and meadows, providing diverse scenery. Trails often traverse distinctive rocky outcrops, known as "roc'h," and areas with archaeological significance. The landscape includes significant elevation changes within the Monts d'Arrée massif.
Last updated: July 9, 2026
4.8
(4)
21
hikers
19.9km
05:22
250m
250m
Hard hike. Very good fitness required. Easily-accessible paths. Suitable for all skill levels.
4.7
(3)
24
hikers
12.1km
03:16
160m
160m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

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4.5
(2)
10
hikers
14.5km
04:00
250m
250m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
4.0
(2)
13
hikers
13.8km
03:43
170m
170m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.
4
hikers
5.61km
01:32
80m
90m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
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Very beautiful lake with a beautiful beach and nautical base.
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Church of SANT-SERVAIS Impressive ensemble consisting of church, ossuary (now museum) and adjoining triumphal arch. The church also reveals numerous original carpentry works with decorations, such as the theatricality of the interior or the literally fantastic stonework that adorns the façade.
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The Château de La Roche-Maurice, a historic Breton jewel from the 13th century, dazzles with its medieval architecture. Nestled in lush greenery, it offers an immersive experience in the feudal past.
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Plage de Sizum - here is the best beach on the lake.
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Superb place for a lunch break or for a night stop! The lake offers water activities and more than pleasant views
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Nice to see when you drive past it in the valley. It's impressive how the dilapidated castle 🏰 sits at the top of the hill. La Roche Maurice, residence of the Viscounts of Léon The castle was first mentioned in 1263, but it is undoubtedly older. With those of MORLAIX, BREST and LESNEVEN, it was one of the most important fortresses of the Viscounts of Léon. These lords wielded considerable power: in addition to their land income, they possessed the right to control ships that ran aground on the shores of Léon, the monopoly of salt production and the catching of large fish, the right to high, middle and low justice, the law , to mint money and build fortresses without requiring the Duke's permission. As a result, this prince could hardly control the actions of these powerful feudal lords, which explains why Henry II Plantagenet, King of England, wanted to get his hands on the duchy in the third quarter of the 12th century, they were among his most ardent opponents. Source: https://larochemaurice.fr/chateau/
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The current parish church has replaced a 14th-century medieval chapel dedicated to Saint-Yves (Testament of Hervé de Léon, dated 1363). It was built in the 16th century. It was at first the Trevial Church of Ploudiry until 1791. The Rohans ceded the land free of charge and paid numerous subsidies to support the building's reconstruction, which took almost half a century to complete. In fact, the stained glass window in the apse dates from 1589; the south portal dates from 1550, the 60 meter high bell tower from 1589. With its double gallery and double bell chamber, it is characteristic of the Leonardo Renaissance. The south portal consists of two double doors framed by an extravagant Renaissance arcade in which the twelve apostles nestle. Source: https://larochemaurice.fr/leglise-saint-yves-et-lenclos-paroissial
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There are over 170 hiking routes available around Le Tréhou, catering to various preferences and skill levels. This includes a wide selection of easy, moderate, and challenging trails to explore the diverse landscapes of the Monts d'Arrée.
Hiking near Le Tréhou offers a varied terrain, characteristic of the Monts d'Arrée. You'll encounter high moors, coniferous forests, and meadows. Many trails also feature distinctive rocky outcrops, locally known as "roc'h," and areas with archaeological significance, providing a refreshing sense of adventure and unique geological interest.
Yes, Le Tréhou offers a good selection of trails suitable for beginners. Approximately 75 of the routes are classified as easy, providing gentle paths to enjoy the local countryside without significant challenges. These routes are perfect for a leisurely walk.
Yes, many of the hiking routes around Le Tréhou are circular, allowing you to start and end at the same point. An example is the Hiking loop from Lann ar Merzher, a moderate 6.5-mile (10.4 km) path that offers varied scenery through the local countryside.
The region around Le Tréhou offers many trails suitable for families, especially among the easier and moderate options. These routes often traverse pleasant woodlands and open fields, providing a safe and enjoyable environment for all ages. Look for routes with shorter distances and less elevation gain for younger hikers.
Le Tréhou and the surrounding Monts d'Arrée region are generally very welcoming for hikers with dogs. The rural setting, extensive network of trails, and natural landscapes provide ample opportunities for your canine companion to explore. Always ensure your dog is under control, especially near livestock or wildlife, and check local regulations regarding leash requirements.
Hikes near Le Tréhou offer opportunities to discover the unique natural features of the Monts d'Arrée. You can expect impressive viewpoints over varied vegetation, high moors, and coniferous forests. The distinctive "roc'h" (rocky outcrops) are also a prominent feature, adding to the mysterious atmosphere and diverse scenery.
While hiking around Le Tréhou, you can explore areas rich in archaeological history, with vestiges from the Bronze Age and Gallo-Roman presence. Nearby, you can also visit historical landmarks such as the 13th-century Château de La Roche-Maurice or the unique Saint-Sauveur Church of Le Faou, which offer cultural excursions to complement your outdoor adventure.
The best time to go hiking in Le Tréhou is generally from spring to autumn. During these seasons, the weather is milder, and the natural landscapes of the Monts d'Arrée are vibrant with diverse flora. Summer offers longer daylight hours, while spring and autumn provide pleasant temperatures and beautiful changing colors, making for ideal hiking conditions.
The hiking routes in Le Tréhou are highly rated by the komoot community, with an average score of 4.3 stars from over 600 reviews. Hikers often praise the diverse terrain, the sense of adventure offered by the Monts d'Arrée, and the well-preserved natural environment. Over 3,800 hikers have used komoot to explore the area's varied trails.
Yes, for experienced trekkers seeking a challenge, Le Tréhou offers several difficult routes. For example, the Drennec Dam – Sizun Beach loop from Sizun is a demanding 12.2-mile (19.6 km) trail with significant elevation changes, providing a rewarding experience for those looking for a more strenuous adventure.
While specific parking details vary by trailhead, most popular starting points for hikes in and around Le Tréhou, especially those near villages or known attractions, offer designated parking areas. It's advisable to check the route details on komoot for specific parking information related to your chosen trail.


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